RT Journal Article
SR Electronic
T1 The Effects of Collimator Malpositioning in Seven Pinhole Tomography
JF Journal of Nuclear Medicine Technology
JO J. Nucl. Med. Technol.
FD Society of Nuclear Medicine
SP 51
OP 55
VO 12
IS 2
A1 Ratzlaff, Neil W.
A1 Brown, Paul H.
A1 Cox, Deborah J.
A1 Krishnamurthy, G.T.
YR 1984
UL http://tech.snmjournals.org/content/12/2/51.abstract
AB We tested the effect of seven pinhole collimator positioning on circumferential count profiles during thallium-201 myocardial imaging by imaging a left ventricular phantom at various angles. The seven pinhole raw data images and profiles were identifiable as malpositioned when the collimator was malpositioned by 10° or more. The phantom’s “cold” spot was shown to propagate into adjacent planes and also into other regions of the heart as a function of collimator positioning. We then developed a method for systematically positioning the collimator correctly, which should aid in preventing similar artifacts in clinical studies.