Objective: IQSPECT is an advanced high-speed SPECT modality for performing myocardial perfusion imaging (MPI), which uses a multi-focus fan beam collimator with resolution recovery reconstruction. The aim of this study was to compare IQSPECT compared with conventional SPECT interms of performance based on standard clinical protocols. In addition, we examined the concordance between convention...

UNLABELLED There are currently no data published regarding the proportion of nuclear medicine centers using SPECT or SPECT/CT rather than planar ventilation/perfusion (V/Q) imaging in patients with suspected acute pulmonary embolism (PE). Furthermore, the reporting criteria used for interpretation of both planar and SPECT V/Q scans are variable and data are lacking regarding which criteria are ...

PURPOSE To assess the role of regional cerebral blood flow measured by technetium-99m hexamethyl propyleneamine oxime (HMPAO) brain single-photon emission CT (SPECT) in viral encephalitis of children. METHODS Eighteen children diagnosed as having viral encephalitis (12 Epstein-Barr virus, 4 herpes simplex virus, and 2 Japanese B virus) underwent Tc-99m HMPAO brain SPECT and brain MR and/or CT...

UNLABELLED The limited spatial resolution of SPECT scanners does not allow an exact measurement of the local radiotracer concentration in brain tissue because partial-volume effects (PVEs) underestimate concentration in small structures of the brain. The aim of this study was to determine which brain structures show greater influence of PVEs in SPECT studies on healthy volunteers and to investi...

Discordance between the (123)I-labelled 15-iodophenyl-3-R, S-methyl pentadecanoic acid (BMIPP) and (201)Tl findings may indicate myocardial viability (MV). This study compared dobutamine stress echocardiography (DSE) and single-photon emission computed tomography (SPECT) using the dual tracers for assessment of MV and prediction of functional recovery after acute myocardial infarction (AMI). DS...

Multimodality visualization aims at efficiently presenting integrated information obtained from different modalities, usually combining a functional modality (SPECT, PET, fMRI) with an anatomical modality (CT, MRI). This chapter presents a technique for 3D integrated visualization of SPECT and MR brain images, where MRI is used as a framework of reference for the display of the SPECT data. Meth...

The objective of this study was to determine the relationship in regional cerebral blood flow (rCBF) as measured with perfusion magnetic resonance imaging (pMRI) and single photon emission computer tomography (SPECT). rCBF was determined in 26 healthy subjects with pMRI and SPECT. After co-registration of pMRI with SPECT, rCBF was determined in 10 brain regions relative to the whole slice value...

Purpose MRI and single-photon emission computed tomography (SPECT) provide complimentary information which could aid in the diagnosis of various diseases. However, acquiring images from both modalities can been problematic. Until recently, SPECT systems could not be integrated with MRI systems due to the use of photomultiplier tubes which do not function in high magnetic fields. The development...

Purpose: We had previously shown the MR compatibility of CZT based single photon detectors and associated nuclear data acquisition electronics [1]. The purpose of the present work was to study the feasibility a combined MRSPECT system operating inside a 4T MR system for dual-modality MR-SPECT imaging. The current investigation included a study of the effect of SPECT detector/collimator system o...

Background: Real cardiac phantoms are often used to assess the performance of software for gated single-photon emission computed tomography(SPECT). However, these phantoms have disadvantages in that they are not very similar to actual hearts and setting a perfusion defect is not easy. To overcome these problems, we developed a digital myocardial phantom, named%Myo-Simu'. The aims of this study ...