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3.
Arch Gynecol Obstet ; 303(5): 1375-1376, 2021 05.
Artículo en Inglés | MEDLINE | ID: mdl-32676858
4.
J Thromb Thrombolysis ; 51(3): 818-820, 2021 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-32728910

RESUMEN

Amniotic fluid embolism (AFE) is a catastrophic condition in the peripartum period and still remains as a leading cause of maternal death. Although over 80% of cases of AFE cases are accompanied by coagulopathy, the pathology of disseminated intravascular coagulation is not well understood not only because of its rarity but also because of the limited availability of laboratory testing in emergent clinical settings. We describe a case of AFE whose characteristic data for coagulation and fibrinolysis were timely depicted with sequential thromboelastography. We believe that the point-of-care, which provides information for both coagulopathy and fibrinolysis, may provide crucial data not only for the treatment of postpartum hemorrhage in daily clinical practice but also for the elucidation of AFE pathophysiology.


Asunto(s)
Coagulación Intravascular Diseminada , Embolia de Líquido Amniótico , Fibrinólisis , Histerectomía/métodos , Complicaciones del Trabajo de Parto , Hemorragia Posparto , Tromboelastografía/métodos , Adulto , Coagulación Intravascular Diseminada/sangre , Coagulación Intravascular Diseminada/complicaciones , Coagulación Intravascular Diseminada/diagnóstico , Coagulación Intravascular Diseminada/etiología , Embolia de Líquido Amniótico/sangre , Embolia de Líquido Amniótico/diagnóstico , Embolia de Líquido Amniótico/fisiopatología , Servicios Médicos de Urgencia/métodos , Servicios Médicos de Urgencia/organización & administración , Femenino , Humanos , Recién Nacido , Masculino , Monitoreo Fisiológico/métodos , Complicaciones del Trabajo de Parto/sangre , Complicaciones del Trabajo de Parto/diagnóstico , Complicaciones del Trabajo de Parto/fisiopatología , Complicaciones del Trabajo de Parto/terapia , Pruebas en el Punto de Atención/organización & administración , Hemorragia Posparto/etiología , Hemorragia Posparto/cirugía , Embarazo , Resultado del Embarazo , Resultado del Tratamiento
5.
Eur J Obstet Gynecol Reprod Biol ; 249: 109-110, 2020 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-32321657

RESUMEN

Obstetricians are sometimes faced with a dilemma in that polypectomy, which is a prerequisite for differentiating malignancy, may be associate with miscarriage or preterm delivery. We describe a case with a decidual polyp resulted in first trimester miscarriage after diagnostic polypectomy. Our experience with this patient provides us important information for clinical practice. That is, decidual polyp can be recognized as early as gestational week 5, the roots of cervical polyps should be meticulously observed, a polyp connected to the decidua is suggestive finding of decidual polyp, and suspected decidual polyp can be managed conservatively.


Asunto(s)
Pólipos/terapia , Complicaciones del Embarazo/terapia , Enfermedades Uterinas/terapia , Aborto Espontáneo/etiología , Adulto , Tratamiento Conservador , Decidua/patología , Femenino , Humanos , Pólipos/complicaciones , Pólipos/patología , Embarazo , Complicaciones del Embarazo/etiología , Complicaciones del Embarazo/patología , Primer Trimestre del Embarazo , Enfermedades Uterinas/complicaciones , Enfermedades Uterinas/patología
8.
Diabetes Metab ; 43(5): 446-452, 2017 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-28433560

RESUMEN

AIMS: To compare insulin glargine 300 U/mL (Gla-300) with glargine 100 U/mL (Gla-100) in Japanese adults with uncontrolled type 2 diabetes on basal insulin and oral anti-hyperglycaemic drugs over 12 months. METHODS: EDITION JP 2 was a randomised, open-label, phase 3 study. Following a 6-month treatment period, participants continued receiving previously assigned once daily Gla-300 or Gla-100, plus oral anti-hyperglycaemic drugs, in a 6-month extension period. Glycaemic control, hypoglycaemia and adverse events were assessed. RESULTS: The 12-month completion rate was 88% for Gla-300 and 96% for Gla-100, with comparable reasons for discontinuation. Mean HbA1c decrease from baseline to month 12 was 0.3% in both groups. Annualised rates of confirmed (≤3.9mmol/L [≤70mg/dL]) or severe hypoglycaemia were lower with Gla-300 than Gla-100 (nocturnal [00:00-05:59h]: rate ratio 0.41; 95% confidence interval: 0.18 to 0.92; anytime [24h]: rate ratio 0.64; 95% confidence interval: 0.44 to 0.94). Cumulative number of hypoglycaemic events was lower with Gla-300 than Gla-100. Adverse event profiles were comparable between treatments. CONCLUSION: Over 12 months, Gla-300-treated participants achieved sustained glycaemic control and experienced less hypoglycaemia, particularly at night, versus Gla-100, supporting 6-month results.


Asunto(s)
Glucemia/análisis , Diabetes Mellitus Tipo 2/tratamiento farmacológico , Hipoglucemia/inducido químicamente , Hipoglucemiantes/uso terapéutico , Insulina Glargina/uso terapéutico , Adulto , Diabetes Mellitus Tipo 2/sangre , Relación Dosis-Respuesta a Droga , Quimioterapia Combinada , Femenino , Humanos , Hiperglucemia/sangre , Hiperglucemia/tratamiento farmacológico , Hipoglucemiantes/administración & dosificación , Hipoglucemiantes/efectos adversos , Insulina Glargina/administración & dosificación , Insulina Glargina/efectos adversos , Japón , Masculino , Persona de Mediana Edad , Resultado del Tratamiento
9.
AJNR Am J Neuroradiol ; 37(11): 1992-1995, 2016 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-27418472

RESUMEN

BACKGROUND AND PURPOSE: Although skull fractures are generally assessed on bone images obtained by using head CT, the combined multikernel technique that enables evaluation of both brain and bone through a change in the window settings of an image set has been reported. The purpose of this retrospective study was to determine the image quality required for the accurate assessment of skull fractures by using head CT. MATERIALS AND METHODS: A random sample of 50 patients (25 nonfracture and 25 simple nondisplaced skull fractures) was selected, and sets of conventional brain and bone images and improved combined multikernel images were reconstructed (4614 images). Three radiologists indicated their confidence levels regarding the presence of skull fractures by marking on a continuous scale for each image set. The mean area under the receiver operating characteristic curve was calculated for each kernel, and the statistical significance of differences was tested by using the Dorfman-Berbaum-Metz method. RESULTS: Although a difference in the diagnostic performance of the 3 radiologists was suggested, the mean area under the curve value showed no significant differences among the 3 reconstruction kernels (P = .95 [bone versus combined]), P = .91 [bone versus brain]), and P = .88 [brain versus combined]). However, the quality of brain images was distinctly poorer than the quality of the other 2 images. CONCLUSIONS: There was no significant difference in the diagnostic performance of brain, bone, and combined multikernel images for skull fractures. Skull fracture diagnosis is made possible by brain image assessments. Combined multikernel images offer the advantage of high-quality brain and bone images.

10.
J Obstet Gynaecol Res ; 42(6): 707-15, 2016 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-26913817

RESUMEN

AIM: The optimal treatment for pelvic organ prolapse has been the subject of much discussion. The aim of this study was to assess the utility of a combination of uterosacral colpopexy and anterior vaginal mesh implantation. METHODS: A single-center prospective cohort study was conducted. Twenty-eight patients with stage III-IV cystocele and uterine prolapse underwent reconstructive surgery. A combination of vaginal hysterectomy, McCall culdeplasty, and trocar-guided anterior vaginal mesh implantation was performed, and the patients' postoperative outcomes were analyzed. Patient satisfaction was investigated using the modified Short Form 12 version 2 (SF-12v2) questionnaire, and interviews regarding sexual behavior were conducted at 1 postoperative year. RESULTS: A bladder injury occurred during the dissection in one case (3.6%). Recurrent vaginal vault prolapse beyond the hymen was observed in one patient (cure rate: 96.4%), and further mesh augmentation was required in this case. Another patient developed mild cystocele (Ba = 0), but was simply observed because she did not complain of any symptoms caused by vaginal descent. We did not experience any other mesh-related complications, such as protrusion, chronic pain, or chronic inflammation, during the follow-up period. The patients' modified SF-12 scores at 12 months were significantly better than their preoperative scores in all eight domains. CONCLUSION: The satisfactory correction of pelvic organ prolapse was achieved using a combination of vaginal hysterectomy and uterosacral ligament colpopexy augmented by anterior vaginal mesh implantation. © 2016 Japan Society of Obstetrics and Gynecology.


Asunto(s)
Histerectomía Vaginal/métodos , Prolapso de Órgano Pélvico/cirugía , Procedimientos de Cirugía Plástica/métodos , Anciano , Cistocele/epidemiología , Femenino , Humanos , Complicaciones Intraoperatorias/epidemiología , Persona de Mediana Edad , Satisfacción del Paciente , Complicaciones Posoperatorias/epidemiología , Estudios Prospectivos , Resultado del Tratamiento
12.
Diabetes Obes Metab ; 18(4): 366-74, 2016 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-26662838

RESUMEN

AIMS: To compare the efficacy and safety of insulin glargine 300 U/ml (Gla-300) with glargine 100 U/ml (Gla-100) in Japanese people with type 2 diabetes using basal insulin plus oral antihyperglycaemic drug(s) [OAD(s)]. METHODS: The EDITION JP 2 study (NCT01689142) was a 6-month, multicentre, open-label, phase III study. Participants (n = 241, male 61%, mean diabetes duration 14 years, mean weight 67 kg, mean body mass index 25 kg/m(2), mean glycated haemoglobin (HbA1c) 8.02 %, mean basal insulin dose 0.24 U/kg/day) were randomized to Gla-300 or Gla-100, while continuing OAD(s). Basal insulin was titrated to target fasting self-monitored plasma glucose 4.4-5.6 mmol/l. The primary efficacy endpoint was HbA1c change over 6 months. Safety endpoints included hypoglycaemia and weight change. RESULTS: Gla-300 was non-inferior to Gla-100 for HbA1c reduction [least squares (LS) mean difference 0.10 (95% confidence interval [CI] -0.08, 0.27) %]. The mean HbA1c at month 6 was 7.56 and 7.52 % with Gla-300 and Gla-100, respectively. Nocturnal confirmed (≤3.9 mmol/l) or severe hypoglycaemia risk was 38% lower with Gla-300 versus Gla-100 [relative risk 0.62 (95% CI 0.44, 0.88)]; annualized rates were 55% lower at night [rate ratio 0.45 (95% CI 0.21, 0.96)] and 36% lower at any time [24 h; rate ratio 0.64 (95% CI 0.43, 0.96)]. Severe hypoglycaemia was infrequent. A significant between-treatment difference in weight change favoured Gla-300 [LS mean difference -1.0 (95% CI -1.5, -0.5) kg; p = 0.0003]. Adverse event rates were comparable between groups. CONCLUSIONS: Japanese people with type 2 diabetes using basal insulin plus OAD(s) experienced less hypoglycaemia with Gla-300 than with Gla-100, while glycaemic control did not differ.


Asunto(s)
Diabetes Mellitus Tipo 2/tratamiento farmacológico , Hiperglucemia/prevención & control , Hipoglucemia/prevención & control , Hipoglucemiantes/administración & dosificación , Insulina Glargina/administración & dosificación , Administración Oral , Anciano , Preparaciones de Acción Retardada/administración & dosificación , Preparaciones de Acción Retardada/efectos adversos , Preparaciones de Acción Retardada/uso terapéutico , Diabetes Mellitus Tipo 2/sangre , Relación Dosis-Respuesta a Droga , Resistencia a Múltiples Medicamentos , Quimioterapia Combinada/efectos adversos , Femenino , Estudios de Seguimiento , Hemoglobina Glucada/análisis , Humanos , Hipoglucemia/inducido químicamente , Hipoglucemia/epidemiología , Hipoglucemiantes/efectos adversos , Hipoglucemiantes/uso terapéutico , Insulina Detemir/efectos adversos , Insulina Detemir/uso terapéutico , Insulina Glargina/efectos adversos , Insulina Glargina/uso terapéutico , Japón/epidemiología , Masculino , Persona de Mediana Edad , Riesgo
13.
Diabetes Obes Metab ; 18(4): 375-83, 2016 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-26662964

RESUMEN

AIM: To compare efficacy and safety of new insulin glargine 300 U/ml (Gla-300) with that of insulin glargine 100 U/ml (Gla-100) in Japanese adults with type 1 diabetes. METHODS: The EDITION JP 1 study (NCT01689129) was a 6-month, multicentre, open-label, phase III study. Participants (n = 243) were randomized to Gla-300 or Gla-100 while continuing mealtime insulin. Basal insulin was titrated with the aim of achieving a fasting self-monitored plasma glucose target of 4.4-7.2 mmol/l. The primary endpoint was change in glycated haemoglobin (HbA1c) over 6 months. Safety measures included hypoglycaemia and change in body weight. RESULTS: Gla-300 was non-inferior to Gla-100 for the primary endpoint of HbA1c change over the 6-month period {least squares [LS] mean difference 0.13 % [95 % confidence interval (CI) -0.03 to 0.29]}. The annualized rate of confirmed (≤3.9 mmol/l) or severe hypoglycaemic events was 34 % lower with Gla-300 than with Gla-100 at night [rate ratio 0.66 (95 % CI 0.48-0.92)] and 20 % lower at any time of day [24 h; rate ratio 0.80 (95 % CI 0.65-0.98)]; this difference was most pronounced during the first 8 weeks of treatment. Severe hypoglycaemia was infrequent. The basal insulin dose increased in both groups (month 6 dose: Gla-300 0.35 U/kg/day, Gla-100 0.29 U/kg/day). A between-treatment difference in body weight change over 6 months favouring Gla-300 was observed [LS mean difference -0.6 kg (95 % CI -1.1 to -0.0); p = 0.035]. Adverse event rates were comparable between the groups. CONCLUSIONS: In Japanese adults with type 1 diabetes using basal plus mealtime insulin, less hypoglycaemia was observed with Gla-300 than with Gla-100, particularly during the night, while glycaemic control did not differ.


Asunto(s)
Diabetes Mellitus Tipo 1/tratamiento farmacológico , Hiperglucemia/prevención & control , Hipoglucemia/prevención & control , Hipoglucemiantes/administración & dosificación , Insulina Glargina/administración & dosificación , Adulto , Preparaciones de Acción Retardada/administración & dosificación , Preparaciones de Acción Retardada/efectos adversos , Preparaciones de Acción Retardada/uso terapéutico , Diabetes Mellitus Tipo 1/sangre , Relación Dosis-Respuesta a Droga , Esquema de Medicación , Resistencia a Múltiples Medicamentos , Quimioterapia Combinada/efectos adversos , Femenino , Estudios de Seguimiento , Hemoglobina Glucada/análisis , Humanos , Hipoglucemia/inducido químicamente , Hipoglucemia/epidemiología , Hipoglucemiantes/efectos adversos , Hipoglucemiantes/uso terapéutico , Insulina Detemir/efectos adversos , Insulina Detemir/uso terapéutico , Insulina Glargina/efectos adversos , Insulina Glargina/uso terapéutico , Japón/epidemiología , Masculino , Persona de Mediana Edad , Riesgo
15.
Ultrasound Obstet Gynecol ; 46(2): 221-6, 2015 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-25366537

RESUMEN

OBJECTIVE: To investigate time intervals of the ductus venosus (DV) flow velocity waveform (FVW) and those of the cardiac cycle that correspond with each DV-FVW component in fetuses with intrauterine growth restriction (IUGR) due to placental insufficiency. METHODS: Women with a pregnancy complicated by IUGR were recruited into the study, as was a normal control group. Time intervals for systolic (S) and diastolic (D) components were measured in DV-FVW as follows: S(DV), from the nadir of the a-wave during atrial contraction to the nadir between the S-wave and D-wave; D(DV), from the nadir between S-wave and D-wave to the nadir of the a-wave. Regarding cardiac cycles, the following variables were measured from ventricular inflow through the tricuspid valve (TV) and mitral valve (MV): S(TV) and S(MV), from the second peak of ventricular inflow caused by atrial contraction (A-wave) to the opening of the atrioventricular valve; D(TV) and D(MV), from the opening of the atrioventricular valve to the peak of the A-wave. In the IUGR group, only the last examination performed within 1 week of delivery was used for analysis. All variables were analyzed statistically using Z-scores. RESULTS: Data were obtained from 249 normal fetuses and 26 fetuses with IUGR. Compared to normal fetuses, S(DV) showed a significant decrease (P < 0.001), while D(DV) showed a significant increase (P < 0.001) in the IUGR group. Regarding cardiac cycles, S(TV) and S(MV) showed significant decreases (P = 0.014 and P < 0.001, respectively) and D(TV) and D(MV) showed significant increases (P = 0.008 and P = 0.002, respectively) in fetuses with IUGR. CONCLUSION: Time-interval alterations of DV-FVW in growth-restricted fetuses reflect the hemodynamic events caused by placental insufficiency.


Asunto(s)
Velocidad del Flujo Sanguíneo/fisiología , Retardo del Crecimiento Fetal/fisiopatología , Corazón Fetal/fisiopatología , Feto/irrigación sanguínea , Insuficiencia Placentaria/fisiopatología , Adulto , Ecocardiografía Doppler/métodos , Femenino , Retardo del Crecimiento Fetal/diagnóstico por imagen , Corazón Fetal/diagnóstico por imagen , Humanos , Válvula Mitral/diagnóstico por imagen , Válvula Mitral/fisiopatología , Insuficiencia Placentaria/diagnóstico por imagen , Embarazo , Estudios Retrospectivos , Válvula Tricúspide/diagnóstico por imagen , Válvula Tricúspide/fisiopatología , Ultrasonografía Prenatal/métodos , Arterias Umbilicales/diagnóstico por imagen , Arterias Umbilicales/fisiopatología , Venas Umbilicales/diagnóstico por imagen , Venas Umbilicales/fisiopatología
16.
Ultrasound Obstet Gynecol ; 45(5): 544-50, 2015 May.
Artículo en Inglés | MEDLINE | ID: mdl-24975921

RESUMEN

OBJECTIVES: To investigate time-interval variables of ductus venosus (DV) flow velocity waveforms (FVWs) in twin-to-twin transfusion syndrome (TTTS), comparing the results with reference ranges from normal singleton fetuses. The impact of laser surgery and the effect of prognostic factors were also evaluated. METHODS: In 107 TTTS cases, DV-FVWs of both recipients and donors were recorded 1 day before and 2 days after laser therapy. Time intervals for systolic (S) and early diastolic (D) peaks were analyzed retrospectively with regard to acceleration time (acc-S and acc-D for S and D, respectively) and deceleration time (dec-S and dec-D for S and D, respectively). For each variable, Z-scores were calculated with respect to previously reported normal reference ranges. RESULTS: Z-scores for all variables showed statistically significant differences from those observed previously in normal fetuses, with the exception of dec-S of donors. The most striking differences were observed in longer dec-S of recipients (P < 0.001) and longer dec-D of donors (P < 0.001). Laser therapy showed significant impact on dec-S and acc-D in recipients and on all variables in donors. Regarding the short-term prognosis, acc-S and dec-S showed significant differences for the prediction of intrauterine fetal demise in donors (P = 0.009 and P = 0.011, respectively). CONCLUSION: This study demonstrates that time-interval variables of DV-FVWs may differentiate the characteristic hemodynamic changes caused by unbalanced blood volume between recipients and donors.


Asunto(s)
Transfusión Feto-Fetal/diagnóstico por imagen , Fetoscopía/métodos , Feto/irrigación sanguínea , Terapia por Láser/métodos , Ultrasonografía Prenatal , Venas Umbilicales/diagnóstico por imagen , Velocidad del Flujo Sanguíneo , Femenino , Transfusión Feto-Fetal/embriología , Transfusión Feto-Fetal/fisiopatología , Transfusión Feto-Fetal/cirugía , Edad Gestacional , Humanos , Embarazo , Pronóstico , Valores de Referencia , Estudios Retrospectivos , Venas Umbilicales/embriología
17.
Diabetes Obes Metab ; 17(3): 254-60, 2015 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-25425297

RESUMEN

AIMS: Two single-dose studies were conducted in Japan and Europe to compare the pharmacokinetic (PK) and pharmacodynamic (PD) profiles of new insulin glargine 300 U/ml (Gla-300) and insulin glargine 100 U/ml (Gla-100) in people with type 1 diabetes mellitus. METHODS: In two double-blind, randomized, crossover studies, 18 Japanese participants (aged 20-65 years) and 24 European participants (aged 18-65 years) with glycated haemoglobin levels ≤9.0% (≤75 mmol/mol) received single subcutaneous doses of Gla-300, 0.4, 0.6 and 0.9 U/kg (0.9 U/kg in the European study only), and Gla-100, 0.4 U/kg. A 36-h euglycaemic clamp procedure was performed after each dosing. RESULTS: The serum insulin glargine concentration (INS) and glucose infusion rate (GIR) developed more gradually into more constant and prolonged profiles with Gla-300 than with Gla-100. In support of this, the times to 50% of glargine exposure and insulin activity were longer for all Gla-300 doses than for Gla-100 during the 36-h clamp period, indicating a more evenly distributed exposure and metabolic effect beyond 24 h. Exposure to insulin glargine and glucose utilization were lower with the 0.4 and 0.6 U/ml Gla-300 doses in both studies compared with the 0.4 U/ml Gla-100 dose. Glucose-lowering activity was detected for up to 36 h with all doses of Gla-300. CONCLUSIONS: Single-dose injections of Gla-300 present more constant and prolonged PK and PD profiles compared with Gla-100, maintaining blood glucose control for up to 36 h in euglycaemic clamp settings in Japanese and European participants with type 1 diabetes.


Asunto(s)
Glucemia/efectos de los fármacos , Diabetes Mellitus Tipo 1/tratamiento farmacológico , Hipoglucemiantes/administración & dosificación , Insulina de Acción Prolongada/administración & dosificación , Adolescente , Adulto , Anciano , Pueblo Asiatico , Glucemia/metabolismo , Estudios Cruzados , Diabetes Mellitus Tipo 1/sangre , Método Doble Ciego , Femenino , Técnica de Clampeo de la Glucosa/métodos , Hemoglobina Glucada/efectos de los fármacos , Humanos , Hipoglucemiantes/farmacocinética , Infusiones Subcutáneas/métodos , Insulina Glargina , Insulina de Acción Prolongada/farmacocinética , Masculino , Persona de Mediana Edad , Población Blanca , Adulto Joven
19.
Bone Marrow Transplant ; 49(1): 110-5, 2014 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-24013691

RESUMEN

Graft rejection remains a major obstacle in allogeneic hematopoietic SCT following reduced-intensity conditioning (RIC-SCT), particularly after cord blood transplantation (CBT). In a murine MHC-mismatched model of RIC-SCT, primary graft rejection was associated with activation and expansion of donor-reactive host T cells in peripheral blood and BM early after SCT. Donor-derived dendritic cells are at least partly involved in host T-cell activation. We then evaluated if such an expansion of host T cells could be associated with graft rejection after RIC-CBT. Expansion of residual host lymphocytes was observed in 4/7 patients with graft rejection at 3 weeks after CBT, but in none of the 17 patients who achieved engraftment. These results suggest the crucial role of residual host T cells after RIC-SCT in graft rejection and expansion of host T cells could be a marker of graft rejection. Development of more efficient T cell-suppressive conditioning regimens may be necessary in the context of RIC-SCT.


Asunto(s)
Rechazo de Injerto/inmunología , Trasplante de Células Madre Hematopoyéticas/métodos , Linfocitos T/inmunología , Acondicionamiento Pretrasplante/métodos , Adulto , Anciano , Animales , Quimerismo , Femenino , Enfermedad Injerto contra Huésped/inmunología , Humanos , Linfocitos/citología , Masculino , Ratones , Ratones Endogámicos C57BL , Persona de Mediana Edad , Modelos Animales , Estudios Retrospectivos , Riesgo , Linfocitos T Citotóxicos/citología , Trasplante Homólogo , Adulto Joven
20.
Br J Radiol ; 84(1000): 335-41, 2011 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-21081572

RESUMEN

OBJECTIVE: We investigated the image quality of multiplanar reconstruction (MPR) using adaptive statistical iterative reconstruction (ASIR). METHODS: Inflated and fixed lungs were scanned with a garnet detector CT in high-resolution mode (HR mode) or non-high-resolution (HR) mode, and MPR images were then reconstructed. Observers compared 15 MPR images of ASIR (40%) and ASIR (80%) with those of ASIR (0%), and assessed image quality using a visual five-point scale (1, definitely inferior; 5, definitely superior), with particular emphasis on normal pulmonary structures, artefacts, noise and overall image quality. RESULTS: The mean overall image quality scores in HR mode were 3.67 with ASIR (40%) and 4.97 with ASIR (80%). Those in non-HR mode were 3.27 with ASIR (40%) and 3.90 with ASIR (80%). The mean artefact scores in HR mode were 3.13 with ASIR (40%) and 3.63 with ASIR (80%), but those in non-HR mode were 2.87 with ASIR (40%) and 2.53 with ASIR (80%). The mean scores of the other parameters were greater than 3, whereas those in HR mode were higher than those in non-HR mode. There were significant differences between ASIR (40%) and ASIR (80%) in overall image quality (p<0.01). Contrast medium in the injection syringe was scanned to analyse image quality; ASIR did not suppress the severe artefacts of contrast medium. CONCLUSION: In general, MPR image quality with ASIR (80%) was superior to that with ASIR (40%). However, there was an increased incidence of artefacts by ASIR when CT images were obtained in non-HR mode.


Asunto(s)
Pulmón/diagnóstico por imagen , Interpretación de Imagen Radiográfica Asistida por Computador/métodos , Tomografía Computarizada por Rayos X/métodos , Algoritmos , Artefactos , Medios de Contraste , Humanos , Procesamiento de Imagen Asistido por Computador/métodos , Dosis de Radiación
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