نتایج جستجو برای: 201tl

تعداد نتایج: 335  

Journal: :Journal of nuclear medicine : official publication, Society of Nuclear Medicine 2001
T Nakano K Asano M Tanaka T Takahashi H Miura S Suzuki

UNLABELLED Although pituitary adenomas are regarded as benign tumors, some of them behave aggressively with malignant behavior of invasion and metastasis. Prediction of such biologic behavior in a tumor is important for therapeutic planning. The purpose of this study was to assess the usefulness of 201Tl chloride SPECT (201Tl SPECT) for evaluation of biologic behavior in pituitary adenomas. M...

Journal: :Annals of nuclear medicine 2001
C Okuyama Y Ushuima T Nakamura M Kikkawa T Nishimura

Thallium-201 scintigraphy was performed in 8 children with neuroblastoma, and uptake by the tumors was evaluated in comparison with the results of 123I-MIBG scintigraphy. No primary tumors or metastatic lymph nodes showed 201Tl accumulation, but in 4 cases of bone marrow metastases accompanied by focal cortical invasion, the metastatic lesion was demonstrated more clearly on the early image tha...

Journal: :Journal of nuclear medicine : official publication, Society of Nuclear Medicine 1996
M Lorberboym L Estok J Machac I Germano M Sacher R Feldman F Wallach D Dorfman

UNLABELLED This study sought to assess whether 201Tl brain SPECT can significantly reduce the time required for the differential diagnosis of primary central nervous system (CNS) lymphoma and cerebral toxoplasmosis in patients with AIDS. METHODS Eighteen patients who presented with focal lesions on CT or MRI, or both, underwent 201Tl brain SPECT shortly after admission and before a CT-guided ...

Journal: :Annals of nuclear medicine 2000
M Ishibashi T Fujii H Yamana K Fujimoto T Rikimaru A Hayashi S Kurata N Hayabuchi

UNLABELLED Although thallium-201 (201Tl) uptake is related to perfusion in many normal tissues, the biologic rationale for 201Tl uptake in tumors is uncertain. To determine if tumor uptake is related to cell proliferation, we correlated the relative retention of 201Tl in lung tumors with expression of Ki-67, an indicator of cell proliferation. METHODS Sixty patients with lung tumors, included...

Journal: :AJNR. American journal of neuroradiology 1993
T Ohnishi S Noguchi N Murakami S Jinnouchi H Hoshi S Futami K Watanabe

PURPOSE To compare MR with thallium-201 scintigraphy in the follow-up of patients who have undergone thyroidectomy and modified radical neck dissection for differentiated thyroid cancer. METHODS Both MR imaging and 201Tl scintigraphy were performed in 39 patients after surgery for differentiated thyroid cancer. Ten patients did not have recurrence; 29 patients had 51 recurrent tumors in the n...

Journal: :Clinical cancer research : an official journal of the American Association for Cancer Research 2004
Carol Walker Daniel G du Plessis Diane Fildes Brian Haylock David Husband Michael D Jenkinson Kathy A Joyce John Broome Klaus Kopitski Joanne Prosser Trevor Smith Sobhan Vinjamuri Peter C Warnke

PURPOSE Since the recognition that oligodendrogliomas may be chemosensitive, their diagnosis and clinical management has become highly controversial. Histopathology diagnosis remains challenging and new tools such as molecular genetics or molecular imaging require evaluation. EXPERIMENTAL DESIGN In a single-center, population-based prospective study, allelic imbalance in chromosomes 1p36, 19q...

Journal: :Journal of nuclear medicine : official publication, Society of Nuclear Medicine 2005
Simone Hemm Valérie Rigau Jeanine Chevalier Marie C Picot Luc Bauchet Hassan El Fertit Marie-Ange Rodriguez Laura Cif Nathalie Vayssière Michel Zanca Pierre Baldet François Segnarbieux Philippe Coubes

UNLABELLED The aim of the present study was to determine the clinical feasibility of integration of stereotactic SPECT (sSPECT) with 201Tl in the stereotactic MRI (sMRI)-based planning of brain tumor biopsy. Furthermore, the predictive value of the integrated techniques was analyzed by comparison with the corresponding histologically determined metabolic activity. METHODS Ten patients underwe...

Journal: :Annals of nuclear medicine 2003
Ching-Chiang Yang Shung-Shung Sun Chun-Yi Lin Feng-Ju Chuang Chia-Hung Kao

PURPOSE Thallium-201 (201Tl) is a recognized tumor-imaging agent; however, the usefulness of 201Tl in prostate cancer has not been studied. The purpose of this preliminary study was to evaluate the efficacy of 201Tl single-photon emission computed tomography (SPECT) imaging for differentiating prostate cancer from benign prostatic hyperplasia (BPH). METHODS 201Tl pelvic SPECT was performed in...

Journal: :Annals of nuclear medicine 2003
Tevfik Fikret Cermik Mahmut Yüksel Celal Karlikaya Latife Doğanay Mevlüt Türe Sakir Berkarda

PURPOSE The aim of this study was to evaluate the relationship between 201Tl tumor uptake, chemotherapeutic response, metastasis, p53 status and survival in non-small cell lung cancer (NSCLC). METHODS A total of 23 patients underwent 201Tl SPECT. In 9 patients, 2nd 201Tl SPECT study were performed 1 week after the 3rd cycle of chemotherapy (ChT), and early (ER) and delayed (DR) tumor/normal l...

Journal: :Circulation 1990
R C Marshall E M Leidholdt D Y Zhang C A Barnett

Technetium-99m hexakis 2-methoxy-2-isobutyl isonitrile (Tc-MIBI) and thallium-201 extraction, washout, and retention were investigated and compared in 20 isolated, isovolumic, retrograde blood-perfused rabbit hearts at flow rates ranging from 0.5 to 3.5 ml/g wet wt min-1 in the absence of tracer recirculation. Mean Tc-MIBI peak instantaneous extraction was lower (0.55 +/- 0.10, p less than 0.00...

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