attenuation-corrected quantitative SPECT images
Effects of attenuation map accuracy on attenuation-corrected micro-SPECT images
... that quantitative differences between uniform and non-uniform attenuation correc- tion are quite small in micro-SPECT ...other attenuation map imperfections ...in attenuation co- ...
11
Small average differences in attenuation corrected images between men and women in myocardial perfusion scintigraphy: a novel normal stress database
... and Quantitative Perfusion SPECT (Cedars ...The Quantitative Perfu- sion SPECT software also creates normal limits by use of low likelihood patients ...
9
Breath-hold CT attenuation correction for quantitative cardiac SPECT
... an attenuation map and a pre- reconstructed SPECT image, prior to reconstruction of a quantitative SPECT image corrected for attenuation and scatter, was limited to translations ...
8
Intravenous contrast-enhanced CT can be used for CT-based attenuation correction in clinical 111In-octreotide SPECT/CT
... PET, SPECT has the advantage of using radioactive labeled tracer molecules with relatively long physical half-lives that to a great extent are similar to the biological processes under ...for SPECT imaging ...
13
Search | Preprints
... relative to rested subjects. The heart was visualized in early whole body scintigraphic images, but overall there were no apparent differences from images reported for rested volunteers. Minimal uptake of ...
13
Susceptibility weighted MR for evaluation of vasodilatory capacity with acetazolamide challenge
... BOLD images were obtained by using a spoiled gradient-recalled acqui- sition in the steady state sequence: 90/44/2; flip angle, 30 8 ; field of view, 22 cm; section thickness, 7 mm (single section); and matrix, ...
7
Quantitative capabilities of four state-of-the-art SPECT-CT cameras
... the images were recon- structed with FBP or 2D OSEM (without resolution ...few SPECT acquisitions of the uniform phantoms were conducted with an elliptical orbit in addition to the cir- cular orbit, and the ...
19
Comparison of heterogeneity quantification algorithms for brain SPECT perfusion images
... The SPECT images were reconstructed from the projec- tion data using the filtered back-projection algorithm with a Hann filter (α = ...No attenuation correction was ...brain SPECT studies in ...
10
Feasibility of Improved Attenuation Correction for SPECT Reconstruction in the Presence of Dense Materials Using Dual Energy Virtual Monochromatic CT: A Phantom Study
... for SPECT reconstruction was not novel; this potential use for dual-energy CT was originally proposed in the early 1990s in order to obtain an energy-corrected attenuation map for SPECT ...
11
Quantitative detection of myocardial ischaemia by stress echocardiography; a comparison with SPECT
... Both SPECT and DSE are well established and more accurate methods than exercise ECG [4-7], although more ...The quantitative techniques have shown promising results in animal experiments [19,20] and in ...
10
Web-based Simulation and Training Environment for Laparoscopic Camera Calibration
... Camera calibration involves estimating the intrinsic and extrinsic parameters of the camera as discussed in earlier sections [14]. These parameters are required to determine the camera’s position and orientation (pose) ...
85
DEVELOPMENT AND VALIDATION OF UV SPECTROPHOTOMETRIC AREA UNDER CURVE METHOD QUANTITATIVE ESTIMATION OF PIPERACILLIN
... of quantitative determination of penicillin family preparations, such as HPLC, spectro- photometry, iodometry, extraction photometry, different variants of voltametry, polarography and kinetic analysis are ...of ...
5
SPECT/CT and its role in imaging and oncology
... on 64 per cent of AC images versus seven per cent of uncorrected images. In the 1980s, the use of external transmission sources such as Ba-133 and Gd-153 were utilised to provide attenuation ...
8
Analysis of quantitative [I-123] mIBG SPECT/CT in a phantom and in patients with neuroblastoma
... and SPECT systems (SPECT/CT), photon absorption is accounted for in SPECT imaging, and similar to positron emis- sion tomography (PET) and PET/CT, provides the basis for rendering SPECT ...
14
Ra-223 SPECT for semi-quantitative analysis in comparison with Tc-99m HMDP SPECT: phantom study and initial clinical experience
... of quantitative planar imaging has been reported by some investigators [9–11], although lesion- based dosimetry is not an easy task on planar nuclear images because of the projection of several overlying ...
11
223Ra-dichloride therapy of bone metastasis: optimization of SPECT images for quantification
... the images obtained with the three selected emission windows exceeded that obtained using only one (85 keV ± 20%) emission window or the sum of two (85 + 154 keV) emis- sion windows by about ...the images ...
12
Study of the effect of energy window width and peak shift on SPECT images to evaluate false diagnosis
... The peak shift percentage effect on SPECT images using heart phantoms shows four rows of vertical long axis cuts of the heart phantom SPECT study with 4 peak shi[r] ...
9
Image-based SPECT calibration based on the evaluation of the Fraction of Activity in the Field of View
... a SPECT acquisition of a large source of a known activity in a determined ...used. SPECT images should be reconstructed with a method that includes attenuation correction (AC) based on CT ...
15
A new approach to scatter correction in SPECT images based on Klein_Nishina equation
... Corresponding author: Shabnam Oloomi, Medical Physics Department, Mashhad University of Medical Science, Mashhad, Iran.. Such removal of scattered photons leads to incr[r] ...
7
Evaluation of the role of system matrix in SPECT images reconstructed by OSEM technique
... Although applying different beam radiation models in system matrix has no significant effect on the image quality, however linear and rectangular detection models at least theoretica[r] ...
6