摘要:

Post-therapy whole-body I-131 images were compared to 5 mCi pretherapy diagnostic studies in 39 cases of well-differentiated thyroid carcinoma treated with I-131 to evaluate the utility of this procedure for the detection of residual thyroid tissue and functioning metastases. The post-therapy studies were performed immediately before hospital discharge, when the patient's whole-body retained dose had just fallen below 30 mCi. The mean therapeutic dose given was 121 mCi, and the mean interval between administration of the therapy dose and imaging was 2.4 days. In 18 cases (46.2%), the post-therapy images demonstrated either additional findings, such as unsuspected cervical node or pulmonary uptake, or more accurate localization of abnormalities seen on the diagnostic study. In 6 additional cases (15.4%), questionable new findings were noted. Although the precise implications of these additional findings are uncertain at present, they may have a significant effect on future patient management and follow-up. Therefore, the authors recommend that post-therapy imaging be included in the post-therapy evaluation of these patients. In addition, these findings would also suggest reevaluation of the advisability of using 1-2 mCi doses of I-131 for diagnostic whole-body imaging.

ISSN:0363-9762    

出版商:OVID    

年代:1989

数据来源: OVID

摘要:

A case of multiple bilateral pulmonary emboli demonstrating complete resolution 48 hours after the intravenous administration of tissue plasminogen activator is presented.

ISSN:0363-9762    

出版商:OVID    

年代:1989

数据来源: OVID

摘要:

A 42-year-old woman with multiple hepatic cysts associated with autosomal polycystic kidney disease was evaluated for abdominal discomfort and new liver test abnormalities following blind aspirations of her liver cysts. Tc-99m mebrofenin hepatobiliary imaging revealed a markedly enlarged liver with multiple photon deficient areas, focal retention of isotope in the left hepatic ductal system, no accumulation of radionuclide in cysts, and an unusual medial gallbladder position. Endoscopic retrograde cholangiography confirmed all of these findings. Abdominal discomfort and liver biochemical abnormalities were attributed to cyst compression of nearby structures, including bile ducts. Hepatobiliary imaging is useful to exclude communication of bile ducts with hepatic cysts, to detect incidental abnormalities such as partial bile duct obstruction, and to distinguish the gallbladder from nearby hepatic cysts.

ISSN:0363-9762    

出版商:OVID    

年代:1989

数据来源: OVID

摘要:

A Tc-99m HM-PAO brain SPECT study of a patient with biopsy-proven Creutzfeld-Jakob disease demonstrated perfusion defects in the left frontal and right temporoparietal areas. A brain CT was normal. The clinical potential of this imaging modality in the evaluation of dementia is discussed.

ISSN:0363-9762    

出版商:OVID    

年代:1989

数据来源: OVID

摘要:

An osteoid osteoma, which rarely occurs in an intraeplphyseal site, was identified by SPECT imaging in the proximal tibial epiphysis of a boy who had lower back pain, which had not been explained by extensive prior investigations.

ISSN:0363-9762    

出版商:OVID    

年代:1989

数据来源: OVID

摘要:

The scintigraphic appearance of hepatic focal nodular hyperplasia of “hot spot” seen on hepatobiliary scintigraphy is correlated with the histopathological appearance of bile ductular cell proliferation seen in this lesion.

ISSN:0363-9762    

出版商:OVID    

年代:1989

数据来源: OVID

摘要:

The sensitivity of SPECT imaging of hepatic blood pool activity using Tc-99m labeled RBCs was contrasted with magnetic resonance and CT imaging in 22 cases. SPECT is a noninvasive technique with a high sensitivity for the diagnosis of hepatic hemangiomas. It is helpful for clarifying equivocal magnetic resonance imaging results.

ISSN:0363-9762    

出版商:OVID    

年代:1989

数据来源: OVID

摘要:

Radionuclide cisternography evaluates cerebrospinal fluid dynamics, while CT and magnetic resonance imaging provide better information about central nervous system anatomy. This article describes two cases of patients with hydrocephalus. Their radionuclide cysternography studies were initially felt to be normal. After correlation with CT scans, massively enlarged ventricles were discovered. Tracer activity had refluxed into the ventricles, simulating normal cerebrospinal fluid rise over the convexities. When radionuclide cisternography studies in patients with excessively enlarged ventricles are interpreted, correlation with other anatomic imaging studies, such as CT and magnetic resonance imaging, is essential. A vertex view acquired during cisternography may also be helpful in correlation with transaxial plane images obtained by CT and magnetic resonance imaging.

ISSN:0363-9762    

出版商:OVID    

年代:1989

数据来源: OVID

摘要:

A rare case of an intravascular neoplastic obstruction of the superior vena cava is discussed. The lesion was detected with gallium single photon emission computed tomography (SPECT) despite a normal appearance on a concurrent radiographic CT study. A computer-generated composite SPECT-CT image confirmed the intravascuiar localization of the radioisotope, and a subsequent CT-guided transthoracic needle biopsy revealed a poorly differentiated adenocarcinoma.

ISSN:0363-9762    

出版商:OVID    

年代:1989

数据来源: OVID

摘要:

TI-201 SPECT was used to evaluate myocardial involvement in 13 patients with Duchenne's muscular dystrophy. Serial studies of 9 patients were done at two-year Intervals. The hypoperfused areas of the left ventricle became more prominent with age and severity.

ISSN:0363-9762    

出版商:OVID    

年代:1989

数据来源: OVID