D W Townsend
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Explore the profile of D W Townsend including associated specialties, affiliations and a list of published articles.
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62
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Recent Articles
31.
Liljemark W, Bloomquist C, Reilly B, Bernards C, Townsend D, Pennock A, et al.
Adv Dent Res
. 1997 Apr;
11(1):14-23.
PMID: 9524438
Measurements of the microbial growth dynamics in natural biofilm communities are almost non-existent. In a recent study, the biofilm formation on teeth was examined. A previously unknown active period of...
32.
Defrise M, Kinahan P, Townsend D, Michel C, Sibomana M, Newport D
IEEE Trans Med Imaging
. 1997 Apr;
16(2):145-58.
PMID: 9101324
This paper presents two new rebinning algorithms for the reconstruction of three-dimensional (3-D) positron emission tomography (PET) data. A rebinning algorithm is one that first sorts the 3-D data into...
33.
Defrise M, Geissbuhler A, Townsend D
Phys Med Biol
. 1994 Mar;
39(3):305-20.
PMID: 15551582
This paper investigates the statistical and systematic accuracy of five three-dimensional reconstruction algorithms for multi-ring PET scanners operated without septa: the reprojection method, the direct Fourier reconstruction, the FAVOR algorithm,...
34.
Clarke S, Assal G, Bogousslavsky J, Regli F, Townsend D, Leenders K, et al.
J Neurol Neurosurg Psychiatry
. 1994 Jan;
57(1):27-34.
PMID: 8301301
A 54-year-old patient who had an isolated small polar thalamic infarct and acute global amnesia with slight frontal type dysfunction but without other neurological dysfunction was studied. Memory improved partially...
35.
Townsend D, Wensveen M, Byars L, Geissbuhler A, Tochon-Danguy H, Christin A, et al.
J Nucl Med
. 1993 Aug;
34(8):1367-76.
PMID: 8326401
Recent advances in fully three-dimensional reconstruction for multi-ring PET scanners have led us to explore the potential of a prototype scanner based on the rotation of two opposing arrays of...
36.
Coburn S, Mahuren J, Pauly T, Ericson K, Townsend D
J Nutr
. 1992 Dec;
122(12):2348-53.
PMID: 1453218
Because pyridoxal phosphate does not normally cross membranes, it was intriguing that the concentration of pyridoxal phosphate is much higher in goat milk than in human milk. We also noted...
37.
Spinks T, Jones T, Bailey D, Townsend D, Grootoonk S, Bloomfield P, et al.
Phys Med Biol
. 1992 Aug;
37(8):1637-55.
PMID: 1518905
Performance characteristics of a new design of positron tomograph with automatically retractable septa for brain imaging have been studied. The device, consisting of block BGO detectors (8 x 8 elements...
38.
Coburn S, Mahuren J, Kennedy M, Schaltenbrand W, Townsend D
J Nutr
. 1992 Feb;
122(2):393-401.
PMID: 1732480
To gain more information about the kinetics of vitamin B-6 metabolism in vivo, the metabolism of tracer was examined after the simultaneous intravenous administration of [32P] and [14C]pyridoxal phosphate and...
39.
Rajeswaran S, Bailey D, Hume S, Townsend D, Geissbuhler A, Young J, et al.
IEEE Trans Med Imaging
. 1992 Jan;
11(3):386-91.
PMID: 18222881
The performance of a pair of multicrystal, high-resolution, bismuth germanate (BGO) block detectors for positron emission tomography (PET) has been investigated. Utilizing the detectors at a separation of 100 mm,...
40.
Defrise M, Townsend D, Bailey D, Geissbuhler A, Michel C, Jones T
Phys Med Biol
. 1991 Jul;
36(7):939-52.
PMID: 1886928
Prior to reconstruction, emission data from a multi-ring PET camera must be corrected (normalized) for variations in detector sensitivity. The appropriate correction coefficients are obtained by measuring the response of...