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Validation of corrections for errors in collimation during measurement of gastric emptying of nuclide-labeled meals.
J Nucl Med. 1983 Mar; 24(3):187-96.JN

Abstract

The study was undertaken to validate phantom-derived corrections for errors in collimation due to septal penetration or scatter, which vary with the size of the gastric region of interest (ROI). Six volunteers received 495 ml of 20% glucose labeled with both In-113m DTPA and Tc-99m DTPA. Gastric emptying of each nuclide was monitored by gamma camera as well as by periodic removal and reinstillation of the meal through a gastric tube. Serial aspirates from the gastric tube confirmed parallel emptying of In-113m and Tc-99m, but analyses of gamma-camera data yielded parallel emptying only when adequate corrections were made for errors in collimation. Analyses of ratios of gastric counts from anterior to posterior, as well as analyses of peak-to-scatter ratios, revealed only small, insignificant anteroposterior movement of the tracers within the stomach during emptying. Accordingly, there was no significant improvement in the camera data when corrections were made for attenuation with intragastric depth.

Authors

No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

6338170

Citation

VanDeventer, G, et al. "Validation of Corrections for Errors in Collimation During Measurement of Gastric Emptying of Nuclide-labeled Meals." Journal of Nuclear Medicine : Official Publication, Society of Nuclear Medicine, vol. 24, no. 3, 1983, pp. 187-96.
VanDeventer G, Thomson J, Graham LS, et al. Validation of corrections for errors in collimation during measurement of gastric emptying of nuclide-labeled meals. J Nucl Med. 1983;24(3):187-96.
VanDeventer, G., Thomson, J., Graham, L. S., Thomasson, D., & Meyer, J. H. (1983). Validation of corrections for errors in collimation during measurement of gastric emptying of nuclide-labeled meals. Journal of Nuclear Medicine : Official Publication, Society of Nuclear Medicine, 24(3), 187-96.
VanDeventer G, et al. Validation of Corrections for Errors in Collimation During Measurement of Gastric Emptying of Nuclide-labeled Meals. J Nucl Med. 1983;24(3):187-96. PubMed PMID: 6338170.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Validation of corrections for errors in collimation during measurement of gastric emptying of nuclide-labeled meals. AU - VanDeventer,G, AU - Thomson,J, AU - Graham,L S, AU - Thomasson,D, AU - Meyer,J H, PY - 1983/3/1/pubmed PY - 1983/3/1/medline PY - 1983/3/1/entrez SP - 187 EP - 96 JF - Journal of nuclear medicine : official publication, Society of Nuclear Medicine JO - J Nucl Med VL - 24 IS - 3 N2 - The study was undertaken to validate phantom-derived corrections for errors in collimation due to septal penetration or scatter, which vary with the size of the gastric region of interest (ROI). Six volunteers received 495 ml of 20% glucose labeled with both In-113m DTPA and Tc-99m DTPA. Gastric emptying of each nuclide was monitored by gamma camera as well as by periodic removal and reinstillation of the meal through a gastric tube. Serial aspirates from the gastric tube confirmed parallel emptying of In-113m and Tc-99m, but analyses of gamma-camera data yielded parallel emptying only when adequate corrections were made for errors in collimation. Analyses of ratios of gastric counts from anterior to posterior, as well as analyses of peak-to-scatter ratios, revealed only small, insignificant anteroposterior movement of the tracers within the stomach during emptying. Accordingly, there was no significant improvement in the camera data when corrections were made for attenuation with intragastric depth. SN - 0161-5505 UR - https://www.unboundmedicine.com/medline/citation/6338170/Validation_of_corrections_for_errors_in_collimation_during_measurement_of_gastric_emptying_of_nuclide_labeled_meals_ L2 - http://jnm.snmjournals.org/cgi/pmidlookup?view=long&pmid=6338170 DB - PRIME DP - Unbound Medicine ER -