نتایج جستجو برای: spect ct
تعداد نتایج: 142504 فیلتر نتایج به سال:
BACKGROUND Yttrium-90 (90Y) positron emission tomography with integrated computed tomography (PET/CT) represents a technological leap from 90Y bremsstrahlung single-photon emission computed tomography with integrated computed tomography (SPECT/CT) by coincidence imaging of low abundance internal pair production. Encouraged by favorable early experiences, we implemented post-radioembolization 90...
A multicenter prospective study was performed in 49 patients with 77 regions of cerebral infarction. Each patient was evaluated in the acute (0-5 days) and subacute (6-17 days) phases by (1) clinical neurologic examination, (2) CT scans, and (3) Nisopropyl-p-1-iodoamphetamine ('IMP) single-photon emission CT (SPECT) scans. The abilities of the scans to (1) detect a lesion and (2) predict the cl...
In the rapidly changing world of medicine, boundaries between specialties are constantly being challenged. Fused and hybrid imaging with integration of single photon emission computed tomography (SPECT) and computed tomography (CT)(SPECT/ CT) and positron emission tomography (PET) and CT (PET/CT), represent an area of very rapid growth with significant implications for the medical profession. S...
The complex anatomy and function of the foot and ankle can make it difficult to determine the cause of symptoms in patients with foot and ankle pathology. Following initial clinical and radiographic assessment, additional imaging with magnetic resonance imaging may be required, which is often seen as the modality of choice. Although sensitive to pathological changes in bone metabolism and vascu...
Radiopharmaceuticals used in standard nuclear medicine for patients with breast cancer are a well-known source of ionizing radiation, emitating gamma-photon particles: tumorotroponin cationic complexes such as 99mTc-Sestamibi/ Tetrofosmin (MIBI/TF); radiolabelled somatostatin analogues 111In-Ocrteoscan/99mTc-Tektrotyd; 99mTc-MDP; 99mTc-Nanocoll and etc. The intensive tracer uptake of the differ...
OBJECTIVE Although SPECT/CT systems have been used for sentinel lymph node (SLN) imaging, few studies have focused on optimization of attenuation correction (AC) and scatter correction (SC). While SLNs could be detected in conventional planar images, they sometimes do not appear in SPECT/CT images. The purpose of this study was to investigate the optimal AC and SC and to improve the detectabili...
OBJECTIVES/HYPOTHESIS Preoperative localization for parathyroid disease has improved in recent years with the advent of dual-phase (99m) Tc-sestamibi single-photon emission computed tomography/computed tomography (SPECT/CT) imaging. However, dual-phase imaging is associated with increased cost, time, and radiation dose. The aim of this study was to investigate the need for late-phase imaging wh...
UNLABELLED The AIM of this study was to determine the clinical relevance of compensating SPECT data for patient specific attenuation by the use of CT data simultaneously acquired with SPECT/CT when analyzing the skeletal uptake of polyphosphonates (DPD). Furthermore, the influence of misregistration between SPECT and CT data on uptake ratios was investigated. METHODS Thirty-six data sets from...
In breast cancer, single-photon emission computed tomography/computed tomography (SPECT/CT) shows the exact anatomical location of sentinel nodes (SN). SPECT/CT mainly exposes axilla and partly exposes atypical sites of extra-axillary lymphatic drainage. The mechanism of how the atypical hot nodes are involved in lymphatic metastasis was retrospectively investigated in the present study, partic...
Hybrid scanners, which enable the performance of single photon emission tomography (SPECT) and X-ray computerized tomography (CT) in one procedure, have considerable potential as an all-rounder in the nuclear medicine departments. However, challenges remain in validating the accuracy of such hybrid systems. In this paper, a systematic validation method with minimum user interaction is proposed,...
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