摘要:

Abnormal distribution of99mTc-PYP was found in an elderly patient who had received 100 ml of radiographic contrast material between the time of injection of the radiopharmaceutical and the performance of the bone scan. Reasons for these alterations are postulated.

ISSN:0363-9762    

出版商:OVID    

年代:1978

数据来源: OVID

摘要:

Splenic visualization with a bone-seeking agent99mTc-methylene diphosphonate (99mTc-MDP) with absence of splenic uptake using sulfur colloid was seen in a 15- year-old boy in sickle cell crisis. Uptake of99mTc-MDP is probably due to splenic infarction and calcification. This represents a potentially sensitive method for following the functional auto-splenectomy process in sickle cell disease and may also detect the presence of splenic tissue when it is not visualized in a sulfur colloid liver/spleen scan. Splenic visualization by bone-seeking agents should not be confused with skeletal lesions or indicate the presence of an abnormal left upper quadrant mass lesion.

ISSN:0363-9762    

出版商:OVID    

年代:1978

数据来源: OVID

摘要:

Metastatic serosal and omental implants from a primary papillary endometrial carcinoma were well demonstrated by radionuclide uptake on a bone scan utilizing99mTc-methylene diphosphonate. Imaging of an endometrial malignancy by a99mTc-labeled phosphate compound has not previously been reported. While the exact mechanism of accumulation in such soft-tissue neoplastic foci is not known, several possibilities have been suggested. In this particular case, the mechanism appears related in some way to the presence of dystrophic calcifications within the metastatic deposits.

ISSN:0363-9762    

出版商:OVID    

年代:1978

数据来源: OVID

ISSN:0363-9762    

出版商:OVID    

年代:1978

数据来源: OVID

摘要:

A 66-year-old woman had autopsy-proven miliary tuberculosis, with regional involvement of the meninges of the left Sylvian fissure. Radionuclide studies of the brain demonstrated the unusual findings of increased perfusion to the left hemisphere and linear increased activity corresponding to the left Sylvian fissure. Computed tomography of the brain was initially within normal limits at a time when the radionuclide study was clearly abnormal.

ISSN:0363-9762    

出版商:OVID    

年代:1978

数据来源: OVID

摘要:

This was a retrospective study of 117 patients, who had both computerized tomography (CT) and nuclear scans of the liver. In the evaluation of hepatic masses, the nuclear and CT scans, demonstrated 83% and 77% of the masses, respectively, in combination they demonstrated 97%. The nuclear scan proved to be a more sensitive procedure for demonstrating the presence of intrahepatic pathology. The CT scans were better able to demonstrate specific disease entities, such as biliary obstruction and fatty infiltration of the liver. CT was also able to evaluate adjacent organs. When used in combination, CT and nuclear scans tended to complement each other and in many cases were helpful in arriving at a more specific diagnosis.

ISSN:0363-9762    

出版商:OVID    

年代:1978

数据来源: OVID

ISSN:0363-9762    

出版商:OVID    

年代:1978

数据来源: OVID

摘要:

In two children with histoplasmosis pulmonary perfusion and ventilation studies revealed mismatched abnormalities characterized by almost unilaterally absent perfusion but normal ventilation in the right lung. Chest roentgenograms demonstrated right hilar enlargement and pulmonary contrast angiograms revealed narrowing of the right pulmonary arteries by extrinsic fibrotic granulomata but no pulmonary emboli were present. Fibrosing mediastinitis due to histoplasmosis was found by mediastinoscopic examination in one of the patients. Non-embolic causes of &OV0312;/&OV0422; mismatch lung imaging are discussed briefly, and the correlation with clinical findings is stressed for the diagnosis of pulmonary emboli.

ISSN:0363-9762    

出版商:OVID    

年代:1978

数据来源: OVID

摘要:

Twenty-one patients with lymphoma were evaluated for the presence of hepatic scan defects following radiotherapy to fields which included the left lobe of the liver. Two distinct patterns of hepatic scan defects were noted: (a) a radiation port defect (Type I), and (b) attenuation of the left lobe (Type II). Five of seven patients evaluated within six weeks after radiotherapy demonstrated Type I defects but all seven subsequently developed Type II defects. Seventeen of the 21 patients developed Type II defects which have persisted (follow-up, up to 66 months). These characteristic defects should not be confused with other causes of hepatic scan defects in evaluating patients with lymphoma. The defects occur in a high percentage of patients and may persist for long periods.

ISSN:0363-9762    

出版商:OVID    

年代:1978

数据来源: OVID

ISSN:0363-9762    

出版商:OVID    

年代:1978

数据来源: OVID