Tomografía computada de doble energía para la detección de lesiones focales hepáticas / Dual-energy computed tomography for the detection of focal liver lesions

Objetivo. Explorar cualitativamente y cuantitativamente el estudio espectral de las lesiones focales hepáticas, comparándolo con la valoración policromática habitual de la tomografía de energía simple. Método. El presente estudio prospectivo incluyó 50 pacientes remitidos para la realización de tomografía computada multidetector abdominal con contraste intravenoso, que tuvieran al menos una lesión focal hepática. La fase portal fue adquirida con energía dual. Se realizaron mediciones densitométricas de las lesiones y del parénquima hepático circundante, tanto en la adquisición policromática basal como en las posteriores reconstrucciones monocromáticas a 40, 70 y 140 keV. Se trazaron las curvas espectrales y se calcularon los índices de doble energía y la relación contraste-ruido. Por último, se hizo una valoración subjetiva de la calidad de las imágenes y la detectabilidad lesional. Resultados. Las diferencias densitométricas entre los distintos tipos de lesiones (avasculares y vascularizadas) y el hígado fueron mayores a bajos niveles energéticos (a la izquierda de la curva espectral) que en la evaluación policromática. En la valoración subjetiva, el nivel energético de 40keV presentó una mayor detectabilidad lesional. Conclusiones. El estudio espectral monocromático mediante tomografía computada de energía dual provee una mayor detectabilidad lesional a 40keV en relación a la que se dispone con la valoración policromática habitual (AU)

Objective. To qualitatively and quantitatively explore the spectral study of focal liver lesions, comparing it with the usual polychromatic assessment with single-energy computed tomography. Material and methods. We prospectively studied 50 patients with at least one focal liver lesion who were referred for abdominal multidetector computed tomography with intravenous contrast material. The portal phase was acquired with dual energy sources. The density of the lesions and of the surrounding liver parenchyma was measured both in the baseline polychromatic acquisition and in the posterior monochromatic reconstructions at 40 keV, 70 keV, and 140 keV. Spectral curves were traced and the dual-energy indices and contrast-to-noise ratio were calculated. Lastly, the quality of the images and the detectability of the lesions were assessed qualitatively. Results. Densitometric differences between the different types of lesions (avascular and vascularized) and the liver were greater at low energy levels (left side of the spectral curve) than in the polychromatic evaluation. In the subjective assessment, the 40keV energy level had the greatest lesion detectability. Conclusions. Monochromatic spectral study with dual-energy computed tomography provides better lesion detectability at 40keV compared to that provided by the ordinary polychromatic evaluation (AU)

Dual-energy computed tomography for the detection of focal liver lesions. / Tomografía computada de doble energía para la detección de lesiones focales hepáticas.

OBJECTIVE: To qualitatively and quantitatively explore the spectral study of focal liver lesions, comparing it with the usual polychromatic assessment with single-energy computed tomography. MATERIAL AND METHODS: We prospectively studied 50 patients with at least one focal liver lesion who were referred for abdominal multidetector computed tomography with intravenous contrast material. The portal phase was acquired with dual energy sources. The density of the lesions and of the surrounding liver parenchyma was measured both in the baseline polychromatic acquisition and in the posterior monochromatic reconstructions at 40 keV, 70 keV, and 140 keV. Spectral curves were traced and the dual-energy indices and contrast-to-noise ratio were calculated. Lastly, the quality of the images and the detectability of the lesions were assessed qualitatively. RESULTS: Densitometric differences between the different types of lesions (avascular and vascularized) and the liver were greater at low energy levels (left side of the spectral curve) than in the polychromatic evaluation. In the subjective assessment, the 40keV energy level had the greatest lesion detectability. CONCLUSIONS: Monochromatic spectral study with dual-energy computed tomography provides better lesion detectability at 40keV compared to that provided by the ordinary polychromatic evaluation.

Asociación entre patrones de llenado ventricular y extensión del realce tardío por resonancia magnética en pacientes con miocardiopatía hipertrófica / Association between ventricular filling patterns and the extent of late enhancement on magnetic resonance imaging in patients with hypertrophic cardiomyopathy

Objetivo. Explorar mediante resonancia magnética cardíaca la relación entre las curvas de llenado ventricular y la extensión del realce tardío (RT) en pacientes con miocardiopatía hipertrófica. Material y métodos. Se incluyeron de forma retrospectiva pacientes consecutivos con sospecha y/o diagnóstico de miocardiopatía hipertrófica, y un grupo control de pacientes pareados según sexo y edad en quienes se realizó una resonancia magnética cardíaca con valoración de RT. Entre otras determinaciones, se evaluaron mediante secuencias cine: tasa de llenado pico, tiempo a la primera tasa de llenado pico y tasa de llenado pico normalizada al volumen de llenado. Resultados. De los 40 pacientes con miocardiopatía hipertrófica, 29 (73%) presentaron RT. Se evidenciaron diferencias significativas respecto a la tasa de llenado pico normalizada (RT positivo 4,9 ± 1,6, vs. RT negativo 5,8 ± 2,2, vs. control 6,3 ± 1,5, p = 0,008) y al tiempo a la tasa de llenado pico (540,6 ± 89,7 ms, vs. 505,5 ± 99,3 ms, vs. 486,9 ± 86,3 ms, p = 0,02). Al estratificar la población en tercios según la tasa de llenado pico normalizada al volumen de llenado se registraron diferencias significativas entre los grupos respecto a la edad (p = 0,002), espesor parietal medio (p = 0,036), masa miocárdica (p = 0,046) y dimensiones auriculares, mientras que no se observaron diferencias significativas respecto al RT. Conclusiones. En pacientes con miocardiopatía hipertrófica encontramos una asociación significativa entre patrones de llenado ventricular y edad, espesores parietales y dimensiones auriculares, mientras que no se identificó una relación significativa con la extensión del RT (AU)

Objective. To explore the relationship between ventricular filling curves and the extent of late enhancement on cardiac magnetic resonance imaging (MRI) in patients with hypertrophic cardiomyopathy. Material and methods. We retrospectively included consecutive patients with suspected and/or confirmed hypertrophic cardiomyopathy and a control group of patients matched for age and sex who underwent cardiac MRI with evaluation of late enhancement. Among other determinations, we evaluated the following parameters on cine sequences: peak filling rate, time to the first peak filling rate, and filling rate normalized to the filling volume. Results. Late enhancement was observed in 29 (73%) of the 40 patients with hypertrophic cardiomyopathy. The normalized peak filling rate was significantly lower in patients with late enhancement (4.9 ± 1.6 in those with hypertrophic cardiomyopathy positive for late enhancement vs. 5.8 ± 2.2 in those with hypertrophic cardiomyopathy negative for late enhancement vs. 6.3 ± 1.5 in controls, p = 0.008) and the time to peak filling was longer in patients with late enhancement (540.6 ± 89.7 ms vs. 505.5 ± 99.3 ms in those with hypertrophic cardiomyopathy negative for late enhancement vs. 486.9 ± 86.3 ms in controls, p = 0.02). When the population was stratified into three groups in function of the normalized peak filling rate, significant differences were observed among groups for age (p = 0.002), mean wall thickness (p = 0.036), and myocardial mass (p = 0.046) and atrial dimensions, whereas no significant differences with respect to late enhancement were seen. Conclusions. In patients with hypertrophic cardiomyopathy, we found a significant association between ventricular filling patterns and age, wall thicknesses, and atrial dimensions, but not with the extent of late enhancement (AU)

Association between ventricular filling patterns and the extent of late enhancement on magnetic resonance imaging in patients with hypertrophic cardiomyopathy. / Asociación entre patrones de llenado ventricular y extensión del realce tardío por resonancia magnética en pacientes con miocardiopatía hipertrófica.

OBJECTIVE: To explore the relationship between ventricular filling curves and the extent of late enhancement on cardiac magnetic resonance imaging (MRI) in patients with hypertrophic cardiomyopathy. MATERIAL AND METHODS: We retrospectively included consecutive patients with suspected and/or confirmed hypertrophic cardiomyopathy and a control group of patients matched for age and sex who underwent cardiac MRI with evaluation of late enhancement. Among other determinations, we evaluated the following parameters on cine sequences: peak filling rate, time to the first peak filling rate, and filling rate normalized to the filling volume. RESULTS: Late enhancement was observed in 29 (73%) of the 40 patients with hypertrophic cardiomyopathy. The normalized peak filling rate was significantly lower in patients with late enhancement (4.9 ± 1.6 in those with hypertrophic cardiomyopathy positive for late enhancement vs. 5.8 ± 2.2 in those with hypertrophic cardiomyopathy negative for late enhancement vs. 6.3 ± 1.5 in controls, p = 0.008) and the time to peak filling was longer in patients with late enhancement (540.6 ± 89.7 ms vs. 505.5 ± 99.3 ms in those with hypertrophic cardiomyopathy negative for late enhancement vs. 486.9 ± 86.3 ms in controls, p = 0.02). When the population was stratified into three groups in function of the normalized peak filling rate, significant differences were observed among groups for age (p = 0.002), mean wall thickness (p = 0.036), and myocardial mass (p = 0.046) and atrial dimensions, whereas no significant differences with respect to late enhancement were seen. CONCLUSIONS: In patients with hypertrophic cardiomyopathy, we found a significant association between ventricular filling patterns and age, wall thicknesses, and atrial dimensions, but not with the extent of late enhancement.

Elevated gastric lesions: virtual gastroscopy.

With the development of multidetector computed tomography and the improvement in the capabilities of workstations, the use of high-quality three-dimensional reconstructions and virtual images can be applied to organs other than the colon such as the stomach. As a noninvasive technique, virtual gastroscopy represents an alternative to conventional endoscopy for the detection of elevated lesions. Findings of this technique are illustrated.

Multislice CT virtual angioscopy of the abdomen.

BACKGROUND: Computed tomographic (CT) angiography represents an important clinical tool in the evaluation of vascular disorders. Virtual angioscopy can be reconstructed with volumetric CT data sets. We evaluated the feasibility and clinical value of this application in the assessment of abdominal vessels. METHODS: Data sets of CT angiographic studies obtained with helical (n = 120) and multislice (n = 180) CT scanners were analyzed on a workstation for postprocessing. Vascular evaluation was done on conventional enhanced axial images, three-dimensional reconstructions, and virtual angioscopic images. RESULTS: We made 123 studies in patients without aortic disease. Of the patients evaluated for stent-graft treatment, 63 showed normal patency, seven had partial thrombosis of the stent-graft, five showed total occlusion of the stent-graft, and 10 had leaks. From the 92 remaining CT studies, 63 vascular aneurysms and nine dissections were diagnosed. CONCLUSION: The current technology produces high-quality virtual angioscopic images. Although axial and multiplanar views are usually adequate for detecting a vascular disorder, virtual angioscopic views better define anatomic details.

Colonoscopia virtual. Experiencia en 500 pacientes / Virtual Colonoscopy. Experience in 500 patients

OBJECTIVE: To show our experience and results in Virtual Colonoscopy (VC). MATERIAL AND METHOD: Five hundred patients with personal or familial history of colorectal carcinoma and/or adenomas, or any kind of coloproctologic symptoms were studied. VCs were practiced using a helical CT scanner (300 patients) and a multislice CT scanner (200 patients) a few hours after Conventional Colonoscopy (CC), considered the gold standard. The patients were evaluated in a prospective blind study, to determine sensitivity and specificity of VC. Findings were classified as: 1) normal studies; 2) studies with pathological findings. This one was subdivided into: 2a) Lesions below 5 mm., 2b) Lesions between 5-9 mm., 2c) Lesions above 9 mm. RESULTS: VC detected 253 normal studies whereas CC only detected 233. The sensitivity and specificity for each subgroup were: 2a) 87.8% and 86.9%; 2b) 95.6% and 91.4%; 2c) 100.0% and 100.0% respectively. CONCLUSION: VC is a feasible and useful method for evaluating the entire colon. It is well tolerated, it has no complications and a high sensitivity and specificity for elevated lesions, especially the ones above or equal to 5 mm.

Colonoscopia virtual. Experiencia en 500 pacientes / Virtual Colonoscopy. Experience in 500 patients

OBJECTIVE: To show our experience and results in Virtual Colonoscopy (VC). MATERIAL AND METHOD: Five hundred patients with personal or familial history of colorectal carcinoma and/or adenomas, or any kind of coloproctologic symptoms were studied. VCs were practiced using a helical CT scanner (300 patients) and a multislice CT scanner (200 patients) a few hours after Conventional Colonoscopy (CC), considered the gold standard. The patients were evaluated in a prospective blind study, to determine sensitivity and specificity of VC. Findings were classified as: 1) normal studies; 2) studies with pathological findings. This one was subdivided into: 2a) Lesions below 5 mm., 2b) Lesions between 5-9 mm., 2c) Lesions above 9 mm. RESULTS: VC detected 253 normal studies whereas CC only detected 233. The sensitivity and specificity for each subgroup were: 2a) 87.8% and 86.9%; 2b) 95.6% and 91.4%; 2c) 100.0% and 100.0% respectively. CONCLUSION: VC is a feasible and useful method for evaluating the entire colon. It is well tolerated, it has no complications and a high sensitivity and specificity for elevated lesions, especially the ones above or equal to 5 mm. (AU)

[Virtual Colonoscopy. Experience in 500 patients]. / Colonoscopía virtual. Experiencia en 500 pacientes.

OBJECTIVE: To show our experience and results in Virtual Colonoscopy (VC). MATERIAL AND METHOD: Five hundred patients with personal or familial history of colorectal carcinoma and/or adenomas, or any kind of coloproctologic symptoms were studied. VCs were practiced using a helical CT scanner (300 patients) and a multislice CT scanner (200 patients) a few hours after Conventional Colonoscopy (CC), considered the gold standard. The patients were evaluated in a prospective blind study, to determine sensitivity and specificity of VC. Findings were classified as: 1) normal studies; 2) studies with pathological findings. This one was subdivided into: 2a) Lesions below 5 mm., 2b) Lesions between 5-9 mm., 2c) Lesions above 9 mm. RESULTS: VC detected 253 normal studies whereas CC only detected 233. The sensitivity and specificity for each subgroup were: 2a) 87.8% and 86.9%; 2b) 95.6% and 91.4%; 2c) 100.0% and 100.0% respectively. CONCLUSION: VC is a feasible and useful method for evaluating the entire colon. It is well tolerated, it has no complications and a high sensitivity and specificity for elevated lesions, especially the ones above or equal to 5 mm.

Colonoscopía virtual. Experiencia en 500 pacientes. / [Virtual Colonoscopy. Experience in 500 patients]

OBJECTIVE: To show our experience and results in Virtual Colonoscopy (VC). MATERIAL AND METHOD: Five hundred patients with personal or familial history of colorectal carcinoma and/or adenomas, or any kind of coloproctologic symptoms were studied. VCs were practiced using a helical CT scanner (300 patients) and a multislice CT scanner (200 patients) a few hours after Conventional Colonoscopy (CC), considered the gold standard. The patients were evaluated in a prospective blind study, to determine sensitivity and specificity of VC. Findings were classified as: 1) normal studies; 2) studies with pathological findings. This one was subdivided into: 2a) Lesions below 5 mm., 2b) Lesions between 5-9 mm., 2c) Lesions above 9 mm. RESULTS: VC detected 253 normal studies whereas CC only detected 233. The sensitivity and specificity for each subgroup were: 2a) 87.8

and 86.9

; 2b) 95.6

and 91.4

; 2c) 100.0

and 100.0

respectively. CONCLUSION: VC is a feasible and useful method for evaluating the entire colon. It is well tolerated, it has no complications and a high sensitivity and specificity for elevated lesions, especially the ones above or equal to 5 mm.

[Virtual gastroscopy. Preliminary experience]. / Gastroscopía virtual. Experiencia preliminar.

OBJECTIVE: To define the role of virtual gastroscopy (VG) in the detection of elevated lesions comparing its results with conventional endoscopy (CE) as the gold standard method. MATERIALS AND METHODS: Between December 2000 and July 2001, 19 patients were evaluated. The age ranged between 41 and 72 (mean 58.8 years old). VG and CE were performed in all the patients during the same week. VG were carried out with a multislice CT scanner (Mx 8000, Marconi Medical Systems). The technical parameters used were 3 mm with slices and 1.5 mm reconstruction intervals. The acquisition time was 22 seconds. Images were sent to a workstation (MxView, Marconi Medical Systems) where they were reprocessed in three different ways: 1) Bidimensionally 2) Tridimensionally 3) Virtual Endoscopy Findings of VG were compared with CE. RESULTS: VG detected 39 lesions, whereas CE detected 40 lesions. There were 39 true-positive findings, 2 true-negative findings, 0 false-positive findings and 1 false-negative findings. The Sensitivity (Se) was 97.5%; Specificity (Sp) was 100%, positive predictive value 100% and Negative predictive value 66%. CONCLUSIONS: VG is a new non-invasive method with high Se and Sp in the detection of elevated lesions. The actual role of VG consist in identification of gastric lesions and possibility to diagnose gastric disease.

Gastroscopía virtual: experiencia preliminar / Virtual gastroscopy: preliminary experience

OBJECTIVE: To define the role of virtual gastroscopy (VG) in the detection of elevated lesions comparing its results with conventional endoscopy (CE) as the gold standard method. MATERIALS AND METHODS: Between December 2000 and July 2001, 19 patients were evaluated. The age ranged between 41 and 72 (mean 58.8 years old). VG and CE were performed in all the patients during the same week. VG were carried out with a multislice CT scanner (Mx 8000, Marconi Medical Systems). The technical parameters used were 3 mm with slices and 1.5 mm reconstruction intervals. The acquisition time was 22 seconds. Images were sent to a workstation (MxView, Marconi Medical Systems) where they were reprocessed in three different ways: 1) Bidimensionally 2) Tridimensionally 3) Virtual Endoscopy Findings of VG were compared with CE. RESULTS: VG detected 39 lesions, whereas CE detected 40 lesions. There were 39 true-positive findings, 2 true-negative findings, 0 false-positive findings and 1 false-negative findings. The Sensitivity (Se) was 97.5%; Specificity (Sp) was 100%, positive predictive value 100% and Negative predictive value 66%. CONCLUSIONS: VG is a new non-invasive method with high Se and Sp in the detection of elevated lesions. The actual role of VG consist in identification of gastric lesions and possibility to diagnose gastric disease

Gastroscopía virtual: experiencia preliminar / Virtual gastroscopy: preliminary experience

OBJECTIVE: To define the role of virtual gastroscopy (VG) in the detection of elevated lesions comparing its results with conventional endoscopy (CE) as the gold standard method. MATERIALS AND METHODS: Between December 2000 and July 2001, 19 patients were evaluated. The age ranged between 41 and 72 (mean 58.8 years old). VG and CE were performed in all the patients during the same week. VG were carried out with a multislice CT scanner (Mx 8000, Marconi Medical Systems). The technical parameters used were 3 mm with slices and 1.5 mm reconstruction intervals. The acquisition time was 22 seconds. Images were sent to a workstation (MxView, Marconi Medical Systems) where they were reprocessed in three different ways: 1) Bidimensionally 2) Tridimensionally 3) Virtual Endoscopy Findings of VG were compared with CE. RESULTS: VG detected 39 lesions, whereas CE detected 40 lesions. There were 39 true-positive findings, 2 true-negative findings, 0 false-positive findings and 1 false-negative findings. The Sensitivity (Se) was 97.5%; Specificity (Sp) was 100%, positive predictive value 100% and Negative predictive value 66%. CONCLUSIONS: VG is a new non-invasive method with high Se and Sp in the detection of elevated lesions. The actual role of VG consist in identification of gastric lesions and possibility to diagnose gastric disease (AU)

Gastroscopía virtual. Experiencia preliminar. / [Virtual gastroscopy. Preliminary experience]

OBJECTIVE: To define the role of virtual gastroscopy (VG) in the detection of elevated lesions comparing its results with conventional endoscopy (CE) as the gold standard method. MATERIALS AND METHODS: Between December 2000 and July 2001, 19 patients were evaluated. The age ranged between 41 and 72 (mean 58.8 years old). VG and CE were performed in all the patients during the same week. VG were carried out with a multislice CT scanner (Mx 8000, Marconi Medical Systems). The technical parameters used were 3 mm with slices and 1.5 mm reconstruction intervals. The acquisition time was 22 seconds. Images were sent to a workstation (MxView, Marconi Medical Systems) where they were reprocessed in three different ways: 1) Bidimensionally 2) Tridimensionally 3) Virtual Endoscopy Findings of VG were compared with CE. RESULTS: VG detected 39 lesions, whereas CE detected 40 lesions. There were 39 true-positive findings, 2 true-negative findings, 0 false-positive findings and 1 false-negative findings. The Sensitivity (Se) was 97.5

; Specificity (Sp) was 100

, positive predictive value 100

and Negative predictive value 66

. CONCLUSIONS: VG is a new non-invasive method with high Se and Sp in the detection of elevated lesions. The actual role of VG consist in identification of gastric lesions and possibility to diagnose gastric disease.

Colonoscopia virtual: una nueva alternativa en el screening del cáncer colorrectal? / Virtual colonoscopy: a new alternative for colorectal neoplasm screening?

Con el objeto de mostrar una nueva modalidad diagnóstica no invasiva en el diagnóstico precoz del cáncer colorrectal se analizaron 46 pacientes seleccionados sobre la base del cuadro clínico y/o los antecedentes de enfermedad colorrectal o poliposis familiar. Los hallazgos obtenidos por colonoscopía virtual los dividimos en siete grupos: lesión polipoidea única (9 pacientes), lesiones polipoideas asociadas (11); estenosis tumorales sin lesión sincrónica (3); estenosis tumorales con lesión sincrónica (6); estenosis no tumorales (4); estudios normales (2); pacientes excluidos por mala preparación. Concluimos que la colonoscopia virtual es una alternativa válida en el screening de la patología colorrectal, presentando algunas ventajas sobre los estudios habituales, ya que no es invasivo, no requiere sedación y permite la estadificación de la enfermedad neoplásica

Colonoscopia virtual: una nueva alternativa en el screening del cáncer colorrectal? / Virtual colonoscopy: a new alternative for colorectal neoplasm screening?

Con el objeto de mostrar una nueva modalidad diagnóstica no invasiva en el diagnóstico precoz del cáncer colorrectal se analizaron 46 pacientes seleccionados sobre la base del cuadro clínico y/o los antecedentes de enfermedad colorrectal o poliposis familiar. Los hallazgos obtenidos por colonoscopía virtual los dividimos en siete grupos: lesión polipoidea única (9 pacientes), lesiones polipoideas asociadas (11); estenosis tumorales sin lesión sincrónica (3); estenosis tumorales con lesión sincrónica (6); estenosis no tumorales (4); estudios normales (2); pacientes excluidos por mala preparación. Concluimos que la colonoscopia virtual es una alternativa válida en el screening de la patología colorrectal, presentando algunas ventajas sobre los estudios habituales, ya que no es invasivo, no requiere sedación y permite la estadificación de la enfermedad neoplásica (AU)

Estenosis carotídea exocreaneal: estudio comparativo por angiotomografía helicoidal 3-D, angio resonancia y ecodoppler color / Exocranial carotid stenosis: a comparative study between 3D-Angio CT, MR-angiography and color Doppler US

Nuestro objetivo fue valorar la utilidad de la angiotomografía computada 3D helicoidal (ATC) en relación con los métodos habituales de diagnóstico (angiorresonancia y eco Doppler), en la estenosis cartídea exocraneal. Para ello, fueron estudiadas con las tres modalidades, 32 arterias carótidas internas en 16 pacientes sintomáticos. Se realizaron las mediciones correspondientes, según el método N.A.S.C.E.T., obteniendo porcentajes de sensibilidad y especificidad de la ATC respecto a la angiorresonancia (ARM). Nuestros hallazgos permitirían incluir la ATC como segundo método prequirúrgico, en pacientes claustrofóbicos o que presenten contraindicaciones para la ARM

Rol de la angiotomografía en el diagnóstico de las complicaciones postratamiento de aneurisma de aorta abdominal / Abdominal aortic aneurysm: value of post-operative follow up with CT-Angiography

Propósito: demostrar la utilidad de la Angio-Tomografía Computada (ATC) en la detección de complicaciones en pacientes con tratamiento de aneurisma de aorta abdominal. Material y métodos: cincuenta y cinco ATC se realizaron como control en pacientes tratados, 42 con colocación de endoprótesis y 13 con cirugía a cielo abierto. Resultados: se detectaron 16 complicaciones, 8 casos en el grupo de pacientes con tratamiento endovascular y 8 en el grupo. Todos los diagnósticos fueron confirmados con angiografía digital o tratamiento quirúrgico. Conclusión: la ATC es un método diagnóstico certero, rápido y mínimamente invasivo en la evaluación de complicaciones en pacientes con tratamiento de aneurismas de aorta

Estenosis carotídea exocreaneal: estudio comparativo por angiotomografía helicoidal 3-D, angio resonancia y ecodoppler color / Exocranial carotid stenosis: a comparative study between 3D-Angio CT, MR-angiography and color Doppler US

Nuestro objetivo fue valorar la utilidad de la angiotomografía computada 3D helicoidal (ATC) en relación con los métodos habituales de diagnóstico (angiorresonancia y eco Doppler), en la estenosis cartídea exocraneal. Para ello, fueron estudiadas con las tres modalidades, 32 arterias carótidas internas en 16 pacientes sintomáticos. Se realizaron las mediciones correspondientes, según el método N.A.S.C.E.T., obteniendo porcentajes de sensibilidad y especificidad de la ATC respecto a la angiorresonancia (ARM). Nuestros hallazgos permitirían incluir la ATC como segundo método prequirúrgico, en pacientes claustrofóbicos o que presenten contraindicaciones para la ARM (AU)

Rol de la angiotomografía en el diagnóstico de las complicaciones postratamiento de aneurisma de aorta abdominal / Abdominal aortic aneurysm: value of post-operative follow up with CT-Angiography

Propósito: demostrar la utilidad de la Angio-Tomografía Computada (ATC) en la detección de complicaciones en pacientes con tratamiento de aneurisma de aorta abdominal. Material y métodos: cincuenta y cinco ATC se realizaron como control en pacientes tratados, 42 con colocación de endoprótesis y 13 con cirugía a cielo abierto. Resultados: se detectaron 16 complicaciones, 8 casos en el grupo de pacientes con tratamiento endovascular y 8 en el grupo. Todos los diagnósticos fueron confirmados con angiografía digital o tratamiento quirúrgico. Conclusión: la ATC es un método diagnóstico certero, rápido y mínimamente invasivo en la evaluación de complicaciones en pacientes con tratamiento de aneurismas de aorta (AU)