K L Greer
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Explore the profile of K L Greer including associated specialties, affiliations and a list of published articles.
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41
Citations
353
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Recent Articles
11.
Gilland D, Jaszczak R, Turkington T, Greer K, Coleman R
J Nucl Med
. 1994 Oct;
35(10):1707-13.
PMID: 7931675
Unlabelled: The goals of this study were to investigate the effect of septal penetration on 123I SPECT activity quantitation using low-energy, high-resolution collimators, and to evaluate a semi-automatic method for...
12.
Li J, Jaszczak R, Greer K, Coleman R
Phys Med Biol
. 1994 Mar;
39(3):643-53.
PMID: 15551605
In this paper we describe the implementation of an accelerated iterative reconstruction algorithm (AIRA) for cone-beam (CB) projections using a single circular orbit in single-photon-emission computed tomography (SPECT). This algorithm...
13.
Gilland D, Jaszczak R, Wang H, Turkington T, Greer K, Coleman R
Phys Med Biol
. 1994 Mar;
39(3):547-61.
PMID: 15551597
A 3D physical model for iterative reconstruction in SPECT has been developed and applied to experimental data. The model incorporates non-uniform attenuation using reconstructed transmission CT data and distance-dependent detector...
14.
Li J, Jaszczak R, Turkington T, Metz C, Gilland D, Greer K, et al.
J Nucl Med
. 1994 Jan;
35(1):135-40.
PMID: 8271034
Unlabelled: To evaluate lesion detectability for clinical evaluation of cone-beam (CB), fanbeam (FB) and parallel-beam (PB) collimator sensitivity, experimentally acquired phantom data were used to assess the advantage of CB...
15.
Li J, Jaszczak R, Wang H, Gullberg G, Greer K, Coleman R
Med Phys
. 1994 Jan;
21(1):145-52.
PMID: 8164581
A filtered backprojection (FBP) algorithm is derived based on Feldkamp's FBP algorithm for a cone beam geometry that has a displaced center of rotation. In cone beam single photon emission...
16.
Li J, Jaszczak R, Greer K, Coleman R
Phys Med Biol
. 1994 Jan;
39(1):165-76.
PMID: 7651994
In this paper the importance of correcting a small centre-of-rotation displacement (approximately 1 mm) in single-photon-emission computed tomography (SPECT) using high-resolution pinhole collimation is demonstrated. A filtered backprojection (FBP) algorithm...
17.
Lowe V, Greer K, Hanson M, Jaszczak R, Coleman R
J Nucl Med
. 1993 Nov;
34(11):1998-2006.
PMID: 8229250
Simultaneously acquired dual-isotope 201Tl/99mTc SPECT studies were performed using cardiac and thoracic phantoms to evaluate the dual-isotope myocardial perfusion technique. Cardiac phantom images representing infarction, viable myocardium and various levels...
18.
Jaszczak R, Gilland D, Hanson M, Jang S, Greer K, Coleman R
J Nucl Med
. 1993 Sep;
34(9):1577-86.
PMID: 8355079
We describe a technique using a line source and a rotatable air-copper-lead assembly to acquire gamma transmission computed tomographic (TCT) data for determining attenuation maps to compensate SPECT emission scans....
19.
Li J, Jaszczak R, Wang H, Greer K, Coleman R
Phys Med Biol
. 1993 Jun;
38(6):743-54.
PMID: 8346283
The difference between the displacement of the centre of rotation (mechanical shift, MS) and the electronic centring misalignment (electronic shift, ES) in cone beam SPECT is evaluated. A method is...
20.
Li J, Jaszczak R, Greer K, Coleman R, Cao Z, Tsui B
Phys Med Biol
. 1993 Feb;
38(2):241-58.
PMID: 8437998
A filtered backprojection (FBP) algorithm is derived to perform cone beam (CB) single-photon emission computed tomography (SPECT) reconstruction with camera tilt using circular orbits. This algorithm reconstructs the tilted angle...