摘要:

A 3 1/2-year-old boy had thigh pain and a leg mass. Bone scanning demonstrated intense uptake within the involved femur, but no uptake within the soft tissues or evidence of metastatic spread. Radiographs and CT scanning showed a large soft tissue mass and periosteal reaction suggestive of Ewing's sarcoma. Following chemotherapy, the patient had an apparently good clinical response. However, bone scanning showed uptake that was more intense and extensive than it was before therapy. Plain films and CT showed that the uptake was evidence of soft tissue calcification and that the mass had shrunk.This is an unusual example of the flare response to therapy because the apparent progression of the disease on bone scanning was caused by extraskeletal uptake.

ISSN:0363-9762    

出版商:OVID    

年代:1991

数据来源: OVID

摘要:

A computer-assisted quantitative analysis was undertaken of normal radiophosphate bone uptake adjacent to the porous-coated acetabular component in asymptomatic patients. Implants ranged from 1.6 to 49 months of age. In 62 hips, it was found that implants newer than 12 months of age had uptakes that were significantly greater than those 12 months or older. Between 12 and 49 months, there was no correlation with age, indicating a stabilization of the remodeling process.

ISSN:0363-9762    

出版商:OVID    

年代:1991

数据来源: OVID

摘要:

The authors describe a case of suppressed normal thyroid tissue in a patient with autonomous toxic nodule, which was visualized by a Tc-99m MIBI thyroid scan without thyrotropin (TSH) stimulation. The findings suggest that Tc-99m MIBI can be a substitute for conventional thyroid imaging using I-131 to visualize suppressed normal thyroid tissue without TSH stimulation and its side effects.

ISSN:0363-9762    

出版商:OVID    

年代:1991

数据来源: OVID

摘要:

The evaluation of a painful hip prosthesis for suspected loosening frequently requires a multi-modality approach. Radionuclide arthroscintigraphy is a valuable adjunct to contrast arthrography, demonstrating greater sensitivity than contrast arthrography in detecting loosening of the femoral component of the prosthesis. Despite its reliability in the evaluation of cemented hip prostheses, the value of arthroscintigraphy in patients with uncemented or porous-coated prostheses is undetermined. The case of a false-positive radionuclide arthroscintigram in a patient with an uncemented prosthesis is reported. The literature is briefly examined, and the potential implications regarding interpretation of arthroscintigraphy in patients with porous-coated prostheses are discussed.

ISSN:0363-9762    

出版商:OVID    

年代:1991

数据来源: OVID

摘要:

Tc-99m MIBI SPECT was used to assess the early benefits of successful percutaneous transluminal coronary angioplasty (PTCA) in nine consecutive patients. SPECT stress studies were done by artificial cardiac pacing just prior to PTCA and 16–20 hours later, with perfusion images obtained 2–3 hours after pacing stress and Tc-99m MIBI injection. Angiographic restenosis was demonstrated in three patients at a later date, and all of these showed no significant improvement on the perfusion study after PTCA. All four patients asymptomatic at 7 months following PTCA had an average 15% improvement in segmental perfusion after the procedure. In two patients symptomatic after PTCA, one showed angio-graphic patency and had >15% improvement in perfusion, while the second showed no scintigraphic improvement (no angiographic data obtained). This preliminary study suggests that Tc-99m MIBI is an important adjunct to angiography in estimating the amount of myocardium “at risk” before and after PTCA.

ISSN:0363-9762    

出版商:OVID    

年代:1991

数据来源: OVID

摘要:

In a series of 62 male patients undergoing exercise TI-201 SPECT myocardial scintigraphy, planar 45° LAO images were acquired before (2–5 minutes postinjection, P1) and after (35 minutes postinjection, P2) the initial SPECT study in order to identify those patients with redistribution during the first 30 minutes after exercise. Consensus interpretation by four readers identified early redistribution (between P1 and P2) in 11 patients (18%), rated major (change of > 1.5 scoring unit) in five and minor (change of 1–1.5 scoring unit) in six. Only one patient (2%) showed major early redistribution that could not be appreciated on corresponding SPECT images. In this preliminary investigation, early thallium redistribution sufficient to affect identification of significant exercise-induced ischemia on SPECT imaging was infrequent and of limited clinical importance.

ISSN:0363-9762    

出版商:OVID    

年代:1991

数据来源: OVID

摘要:

A neonate with infantile polycystic kidney disease underwent Tc-99m DMSA imaging. The pattern of uptake in infantile polycystic disease is different from the multiple cystic lesions reported in the literature for adult polycystic kidney disease. The infantile pattern of uptake shows large kidneys with diffuse, symmetric localization of the radiopharmaceutical, which seems to be characteristic and may be pathognomonic of the disease process.

ISSN:0363-9762    

出版商:OVID    

年代:1991

数据来源: OVID

摘要:

The scintigraphic appearance of an overuse injury at the insertion of the iliotibial band is described. This injury was depicted on three-phase bone scintigraphy as focally increased radionuclide concentration in the anterolateral tibial condyle (lateral tibial tubercle) where the iliotibial band inserts. Overuse injuries involving the insertion of the iliotibial band are uncommon and are not to be confused with a stress fracture or other bony lesion involving the lateral tibial condyle.

ISSN:0363-9762    

出版商:OVID    

年代:1991

数据来源: OVID

摘要:

Forty-six epileptic patients with partial seizures and normal CT underwent 48 examinations of early and delayed SPECT using I-123 IMP in the interictal phase. One of them underwent a follow-up SPECT in a more stable state compared to the first SPECT. Another patient, with informed consent, underwent a follow-up SPECT in combination with pharmacologic activation with bemegride. Early SPECT was performed 30 minutes after an IMP Injection and delayed SPECT 4 to 4 1/2 hours later. Temporal changes in uptake pattern were visually classified into six types and compared with known patterns of SPECT uptake in relation to ischemic, hyperemic, and other changes. These were also correlated with the amount of epileptic activity seen on the EEG.

ISSN:0363-9762    

出版商:OVID    

年代:1991

数据来源: OVID

摘要:

The multiphase bone scan features of melorheostosis are presented. Early increased tracer delivery demonstrated by blood pool imaging supports the concept of ongoing accelerated bony metabolism as a cause of tracer uptake within the osteosclerotic lesions of melorheostosis. There is excellent correlation between the scintigraphic and radiographic distribution of these lesions.

ISSN:0363-9762    

出版商:OVID    

年代:1991

数据来源: OVID