摘要:

A Tc-99m macroaggregated albumin (MAA) perfusion lung scan and a Tc-99m DTPA aerosol ventilation scan were performed for suspicion of pulmonary embolism (PE) in a patient who was ten weeks pregnant. There was considerable reluctance on the part of the obstetricians to permit this study. Standard MIRD dose estimates to the fetus were performed, which showed a maximum fetal exposure of about 50 mrem. It was concluded that the risk to mother and fetus from undiagnosed and untreated PE is much greater than the negligible risk to the fetus from the radiation exposure; fear of fetal radiation damage should not be a deterent to performing these scans.

ISSN:0363-9762    

出版商:OVID    

年代:1985

数据来源: OVID

摘要:

A review of 100 consecutive hepatobiliary studies revealed eight cases in which there was prominent gastric reflux of the Tc-99m diisopropyl-IDA beginning 0.5 to 2.0 hours into the procedure. Five of these individuals had pancreatitis (four acute, one chronic). Hence, pancreatitis was involved in five out of eight of the studies with marked gastric reflux. A study of discharge records showed that a total of ten of the patients in this series had pancreatitis. Since only five showed prominent gastric reflux, the incidence was 50%. Other disorders accounted for the three remaining gastric reflux cases observed in 90 patients.

ISSN:0363-9762    

出版商:OVID    

年代:1985

数据来源: OVID

摘要:

The case of a 59-year-old woman with malignant lymphoma who was investigated for fever and left upper quadrant abdominal pain is presented. A combined spleen/lung scan showed marked medial displacement of an enlarged spleen and a gallium scan showed increased splenic uptake consistent with Iymphomatous infiltration. The diagnosis of prior splenic rupture with subphrenic hematoma was confirmed at laparotomy.

ISSN:0363-9762    

出版商:OVID    

年代:1985

数据来源: OVID

摘要:

Abnormal accumulation of Tc-99m MDP in two metastatic lesions of the liver was observed in a patient with resected colon carcinoma. Single-photon emission computed tomography (SPECT) revealed characteristic marginal accumulation of Tc-99m MDP in both of those metastatic lesions. X-ray CT showed the corresponding marginal calcification in one of the metastases, but no apparent calcification was observed in the other lesion. Two months later, however, the latter also became calcified on x-ray CT. These findings suggest that the accumulation of Tc-99m MDP in the present case is strongly related to the calcium deposition and that Tc-99m MDP may accumulate in a calcified metastatic lesion before the calcification appears on x-ray CT.

ISSN:0363-9762    

出版商:OVID    

年代:1985

数据来源: OVID

摘要:

ECT imaging, using Tc(V)-99m dimercaptosuccinic acid [Tc(V)-DMS] was performed in two patients with lung metastasis of osteosarcoma, and the results were compared with those of CT scan. Clear accumulation of Tc(V)-DMS was recognized in all cases in the same area that CT scans demonstrated. Tc(V)-DMS was labeled under optimal pH 8, had very low SnCl2concentrations, an equilibrium between a stable form and a dissociated form of anion TcO43−structurally similar to PO43−, and was postulated for tumor uptake. Considering this proposed mechanism for Tc(V)-DMS uptake by tumor cells, ECT imaging using this tracer could be of use in the early detection of lung metastasis of osteosarcoma.

ISSN:0363-9762    

出版商:OVID    

年代:1985

数据来源: OVID

摘要:

Four patients undergoing routine bone imaging with a Tc-99m bone imaging agent were observed to have multiple focal areas of increased uptake in the lungs. Delayed or repeat examination demonstrated resolution of the areas. The authors conclude that this was an isolated and bizarre case of aggregate formation.

ISSN:0363-9762    

出版商:OVID    

年代:1985

数据来源: OVID

摘要:

A case of patent arterial grafts causing an abnormal Tc-99m sulfur colloid bleeding scan is presented. This finding has not been reported previously.

ISSN:0363-9762    

出版商:OVID    

年代:1985

数据来源: OVID

摘要:

Liver imaging was performed in two patients with traumatic right hemidiaphragmatic hernia. It has elucidated the cause of obliteration of the right hemidiaphragmatic shadow on the chest x-ray. These cases are illustrative of the usefulness of liver imaging in the diagnosis of traumatic right hemidiaphragmatic hernia as well as hepatic injury.

ISSN:0363-9762    

出版商:OVID    

年代:1985

数据来源: OVID

摘要:

Several examples of what is believed to be lymph node uptake of the bone imaging agent Tc-99m imidodiphosphate (Tc-99m IDP) are presented. This agent may prove to be useful for lymphoscintigraphy.

ISSN:0363-9762    

出版商:OVID    

年代:1985

数据来源: OVID

摘要:

A 28-year-old man presented with paresthesias, fatigue, central cyanosis, and erythrocytosis. A first pass flow study with Tc-99m as free pertechnetate was done, among other tests, to exlude a central shunt when a persistent left superior vena cava was incidentally detected. The value of radionuclide angiocardiography to examine the central circulation noninvasively was again illustrated in this case.

ISSN:0363-9762    

出版商:OVID    

年代:1985

数据来源: OVID