RESUMO
We present the case report of a patient with a history of lung cancer in whom the typical pattern of hypertrophic osteoarthropathy was seen on bone scintigraphy. We discuss the etiologies, pathophysiology, and management of this entity.
Assuntos
Osso e Ossos/diagnóstico por imagem , Osteoartropatia Hipertrófica Secundária/diagnóstico por imagem , Humanos , Masculino , Pessoa de Meia-Idade , Osteoartropatia Hipertrófica Secundária/patologia , CintilografiaRESUMO
We present a patient with spleen uptake on bone scanning that was due to sickle cell disease. We also discuss other etiologies for this finding.
Assuntos
Anemia Falciforme/diagnóstico por imagem , Anemia Falciforme/metabolismo , Osso e Ossos/diagnóstico por imagem , Baço/diagnóstico por imagem , Baço/metabolismo , Medronato de Tecnécio Tc 99m/metabolismo , Medronato de Tecnécio Tc 99m/farmacocinética , Osso e Ossos/metabolismo , Feminino , Humanos , Achados Incidentais , Compostos Radiofarmacêuticos , Tomografia Computadorizada de Emissão de Fóton Único/métodos , Adulto JovemRESUMO
In this report, we present a case of complex regional pain syndrome in a 55-y-old woman in whom the diagnosis was made on the basis of the bone scan findings. We also discuss the typical and atypical scintigraphic presentations of this entity, including pathophysiology and management.
Assuntos
Síndromes da Dor Regional Complexa/diagnóstico por imagem , Ossos da Mão/diagnóstico por imagem , Medronato de Tecnécio Tc 99m , Tomografia Computadorizada de Emissão de Fóton Único/métodos , Articulação do Punho/diagnóstico por imagem , Diagnóstico Diferencial , Feminino , Humanos , Pessoa de Meia-Idade , Compostos RadiofarmacêuticosRESUMO
On brain perfusion SPECT, a primary brain lesion presents as a localized defect that corresponds to the mass lesion. (99m)Tc-HMPAO images generally show a focal defect in the region of abnormality, whether containing necrotic tissue, recurrent tumor, or both. Further characterization with MR imaging is needed to confirm the diagnosis, as demonstrated in this case report.
Assuntos
Imageamento por Ressonância Magnética , Meningioma/diagnóstico por imagem , Tecnécio Tc 99m Exametazima , Tomografia Computadorizada de Emissão de Fóton Único , Adulto , Feminino , Humanos , Meningioma/patologiaRESUMO
Lumbosacral transitional vertebra (LSTV) is a congenital anomaly of the lumbosacral junction. The association between back pain and LSTV is controversial; however, in our patient the symptoms localized to a hemisacralized left transverse process of L5. LSTV should be included in the differential diagnosis in young patients with lower back pain, and scintigraphic imaging should be considered for diagnostic purposes.
Assuntos
Imagem Multimodal , Coluna Vertebral/anormalidades , Medronato de Tecnécio Tc 99m , Tomografia Computadorizada de Emissão de Fóton Único , Tomografia Computadorizada por Raios X , Adolescente , Feminino , Humanos , Região Lombossacral/diagnóstico por imagem , Coluna Vertebral/diagnóstico por imagemRESUMO
We present a case demonstrating how correlative imaging with (123)I-ioflupane SPECT and (18)F-FDG PET can be used to help make the diagnosis of Lewy body disease more specific.
Assuntos
Fluordesoxiglucose F18 , Doença por Corpos de Lewy/diagnóstico por imagem , Nortropanos , Tomografia por Emissão de Pósitrons/métodos , Compostos Radiofarmacêuticos , Tomografia Computadorizada de Emissão de Fóton Único/métodos , Idoso de 80 Anos ou mais , Encéfalo/diagnóstico por imagem , Diagnóstico Diferencial , Humanos , MasculinoRESUMO
Stress injury is a common cause of exercise-induced anterior shin pain. It is important to distinguish between the various causes of stress injury in a timely manner in order to optimize favorable treatment outcomes. Here, we will discuss a case of medial tibial stress syndrome, or shin splints, as one of the causes of shin pain, as well as how to approach shin pain for a successful diagnosis.
Assuntos
Síndrome do Estresse Tibial Medial/complicações , Síndrome do Estresse Tibial Medial/diagnóstico por imagem , Dor/etiologia , Corrida , Adolescente , Diagnóstico Diferencial , Feminino , Humanos , Dor/diagnóstico por imagem , Cintilografia , Compostos Radiofarmacêuticos , Medronato de Tecnécio Tc 99m , Tíbia/diagnóstico por imagem , Tíbia/lesõesRESUMO
We present a case illustrating how cerebral perfusion scintigraphy can be used to assist in crucial medical decision making in the intensive care setting for patients who are maintained on life support but are clinically suspected to have brain death. Cerebral perfusion scintigraphy can confirm brain death but cannot be used to diagnose it. (99m)Tc-HMPAO and (99m)Tc-ethylcysteinate dimer are the preferred imaging agents since they cross the blood-brain barrier.
Assuntos
Morte Encefálica/diagnóstico por imagem , Imagem de Perfusão , Pré-Escolar , Feminino , Humanos , Cuidados para Prolongar a VidaRESUMO
We present a patient with a remote history of splenectomy and recent hemicolectomy for colon adenocarcinoma. On routine surveillance chest/abdomen/pelvis CT, a lesion suspicious for hepatic metastasis was identified. Followup MRI was inconclusive. For more specific tissue characterization, imaging with Tc-99m heat-damaged RBCs was obtained to guide further patient management. Tc-99m-labeled, heat-damaged RBC scintigraphy is an underused modality that is highly specific for detecting ectopic or accessory splenic tissue. There have been many reported cases of patients undergoing unnecessary biopsies or laparotomies to remove suspicious masses that were subsequently found to be ectopic splenic tissue.
Assuntos
Imagem Molecular , Medicina Nuclear , Radioterapia/métodos , Sociedades Científicas , Doenças da Glândula Tireoide/radioterapia , Criança , Documentação , Feminino , Seguimentos , Humanos , Radioisótopos do Iodo/efeitos adversos , Radioisótopos do Iodo/uso terapêutico , Gravidez , Controle de Qualidade , Radioterapia/efeitos adversos , Radioterapia/instrumentação , Relatório de Pesquisa , SegurançaRESUMO
PURPOSE: Proper identification of the cardiac cycle is essential for gated SPECT myocardial perfusion imaging. We have developed an alternate method of ECG for gating, that is, using the peripheral pulse wave (PW) as the triggering signal for gated SPECT acquisition. The aim of this study is to compare the use of this method of gating with the standard ECG trigger. METHODS: We tested the PW triggering by comparing it with the ECG trigger. We evaluated 33 patients (25 males, 8 females), average age of 61 years (39-80) referred for stress myocardial perfusion imaging. Data from all patients were acquired twice and were processed by CEqual and QGS software. We compared the left ventricular ejection fraction (LVEF), end-diastolic and end-systolic volumes (EDV, ESV). Paired t test and Pearson correlation coefficient were used for comparison. RESULTS: The mean LVEF, EDV, and ESV calculated with the ECG trigger were 0.52, 120, and 64, respectively, those with the pulse-wave trigger were 0.48, 126, and 71, respectively. Mean paired difference for LVEF was -0.034 (P<0.001), for EDV 5.9 (P=0.012), and for ESV 7.9 (P<0.001). Pearson correlation coefficient for LVEF was 0.955, for EDV 0.987, and for ESV 0.991 (P<0.001 for all correlations). CONCLUSION: Triggering of gated-data acquisition by the PW is feasible. Quantitative parameters of cardiac function correlate highly with those obtained from the ECG trigger and the absolute differences are not clinically significant across a wide range of values.