ABSTRACT
No disponible
Subject(s)
Humans , Male , Adult , Osteomyelitis/diagnostic imaging , Humerus/diagnostic imaging , Positron Emission Tomography Computed Tomography/methods , Fluorodeoxyglucose F18/analysisABSTRACT
No disponible
Subject(s)
Humans , Female , Adult , Polychondritis, Relapsing/complications , Polychondritis, Relapsing , Fluorodeoxyglucose F18/analysis , Positron-Emission Tomography/methods , Positron-Emission Tomography , Cyclophosphamide/therapeutic use , Granulomatosis with Polyangiitis/complications , Prednisolone/therapeutic use , Adrenal Cortex Hormones/therapeutic use , Immunosuppression Therapy , Nuclear Medicine/methodsABSTRACT
Non-invasive characterization of adrenal lesions is a commonly encountered diagnostic challenge. Characteristic clinical and correlative imaging findings may assist in only arriving at a probable diagnosis. Currently, 18F-FDG PET/CT is considered to provide the most comprehensive imaging information. We here present a case of bilateral adrenal tuberculosis that highlights the need for caution during the interpretation of 18F-FDG PET/CT and also the need to suggest histopathological correlation (AU)
La caracterización no invasiva de las lesiones suprarrenales es un frecuente desafío diagnóstico. Las características clínicas y la correlación con los hallazgos de las técnicas de imagen pueden sugerir un diagnóstico probable, siendo en la actualidad la PET/TC con 18F-FDG la técnica que proporciona la mayor información. Presentamos un caso de tuberculosis suprarrenal bilateral que destaca la necesidad de ser prudentes en la interpretación de la PET/TC con 18F-FDG y la necesidad de su correlación histopatológica (AU)
Subject(s)
Humans , Male , Middle Aged , Tuberculosis/complications , Tuberculosis , Adrenal Glands/pathology , Adrenal Glands , Fluorodeoxyglucose F18/therapeutic use , Adrenal Insufficiency , Mediastinal DiseasesABSTRACT
Anti-histidyl (Jo-1) antibodies have been implicated in the pathogenesis of anti-synthetase syndrome (ASS). A case is presented of a 55-year-old male patient presenting with pyrexia of unknown origin and inconclusive routine investigations. 18F-FDG PET/CT was performed to locate any abnormal focus, which showed increased FDG uptake in the proximal shoulder muscles, as well as lung lesions. Subsequent investigation showed the presence of anti Jo-1 antibody, and diagnosed as an anti-synthetase syndrome. The patient was successfully treated with glucocorticoids and cyclophosphamide, and the response was assessed with symptomatic relief and disappearance of FDG uptake in lung and muscle lesions on post-treatment FDG PET/CT (AU)
Los anticuerpos antihistidil (Jo-1) están implicados en la patogenia del síndrome antisintetasa. Presentamos un varón de 55 años con fiebre de origen desconocido y exploraciones de rutina no concluyentes. La 18F-FDG PET/TC, realizada para la localización de un foco patológico mostró, un aumento de la captación de FDG en la musculatura proximal de los hombros y en lesiones pulmonares. La investigación posterior demostró la presencia de anticuerpos anti Jo-1 y se diagnosticó un síndrome antisintetasa. El paciente fue satisfactoriamente tratado con glucocorticoides y ciclofosfamida. La respuesta se evaluó por el alivio sintomático y por la desaparición de la captación de FDG en las lesiones pulmonares y musculares demostrada en la 18F-FDG PET/TC postratamiento (AU)
Subject(s)
Humans , Male , Middle Aged , Fluorodeoxyglucose F18/analysis , Positron-Emission Tomography/instrumentation , Positron-Emission Tomography/methods , Positron-Emission Tomography , Fever of Unknown Origin/complications , Fever of Unknown Origin/etiology , Fever of Unknown Origin , Polymyositis/complications , Polymyositis , Glucocorticoids/therapeutic use , Cyclophosphamide/therapeutic useABSTRACT
No disponible
Subject(s)
Humans , Male , Middle Aged , Tomography, Emission-Computed/instrumentation , Tomography, Emission-Computed, Single-Photon/instrumentation , Tomography, Emission-Computed, Single-Photon/methods , Technetium , Tomography, Emission-Computed/methods , Tomography, Emission-Computed , Technetium Tc 99m Medronate , Abscess , Musculoskeletal System/pathology , Musculoskeletal System , Peritoneal Neoplasms , Kidney Neoplasms/complications , Kidney NeoplasmsABSTRACT
Hydronephrosis is a common finding in urinary tract outflow obstruction. Chronically obstructed hydronephrotic system may be associated with parenchymal changes. Ultrasound, intravenous urography, micturating cysto-urethrogram and scintigraphy are commonly performed to evaluate the cause of obstruction. In childhood, pelviureteric junction obstruction is a common cause of the hydronephrosis. Hydronephrosis can also be present in horseshoe kidneys due to poor drainage. However, a large sized hydronephrotic cavity may obscure the finding of horseshoe kidney. A case was reported, and it was diagnosed as horseshoe kidney on follow-up renal dynamic scan and confirmed with the help of dimercaptosuccinic acid SPECT/CT (AU)
La hidronefrosis es un hallazgo común en la obstrucción del tracto urinario. La obstrucción crónica del sistema urinario puede llevar asociados cambios en el parénquima renal. La ecografía, la urografía intravenosa, la cistoureterografía miccional y la gammagrafía renal se realizan habitualmente para evaluar la causa de la obstrucción. Durante la infancia, la obstrucción de la unión pieloureteral es la causa más común de hidronefrosis. La hidronefrosis también se puede presentar en los riñones en herradura debido a un drenaje urinario escaso. Sin embargo, la presencia de una gran cavidad de hidronefrosis puede oscurecer el hallazgo de un riñón en herradura. Presentamos un caso clínico de un riñón en herradura detectado en el seguimiento mediante gammagrafía renal dinámica, y confirmado con la ayuda de la SPECT/TC renal con ácido dimercaptosuccínico (AU)
Subject(s)
Child , Humans , Male , Technetium Tc 99m Dimercaptosuccinic Acid , Tomography, Emission-Computed, Single-Photon/instrumentation , Tomography, Emission-Computed, Single-Photon/methods , Tomography, Emission-Computed, Single-Photon , Ureteral Obstruction/complications , Ureteral Obstruction , Tomography, Emission-Computed/instrumentation , Tomography, Emission-Computed/methods , Tomography, Emission-Computed , Urography/methods , Hydronephrosis/complications , HydronephrosisABSTRACT
The cyclotron is the most widely used particle accelerator for producing medically important radio nuclides. Many medical centers in India have installed compact medical cyclotrons for on-site production of short-lived positron-emitting radio nuclides such as (18)F, (13)N, and (11)C. A mandatory requirement for cyclotron installation is radiation control permit from Atomic Energy Regulatory Board. Cyclotron radiation survey is an integral part of the overall radiation safety in the cyclotron facility. Radiation surveillance in and around a newly installed cyclotron was performed using ionization chamber counter and Geiger Muller counter before, during and after operating the cyclotron. The readings were recorded at various locations where a high radiation field was expected. The results were recorded, tabulated and analyzed. The highest exposure level (0.93 µSv) was found at the back wall of the radiochemistry lab facing the cyclotron vault. Reason for the high exposure of 0.93 µSv/h: Synthesis of (18)F-Fluoro-Deoxy-Glucose ((18)F-FDG) was going in the synthesis module and activity ((18)F) was present in the synthesis module when reading was taken. All other values were found to be below the recommended levels of exposure.
ABSTRACT
A seven-year-old male child presented with swelling at the left temporal region. His skull X-ray was normal. A three-phase bone scan showed increased blood flow, soft tissue activity, and increased tracer concentration in the left temporal region. Single photon emission computed tomography (SPECT) imaging of the skull revealed full thickness involvement of the left temporal bone. Our case report shows that, in osteomyelitis of the skull, SPECT imaging provides significantly more information for identifying the extent and thickness of bone involvement.
