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Gamma camera collimator considerations for imaging 123I.

Ronald E. McKeighen, +2 more
- 01 May 1974 - 
- Vol. 15, Iss: 5, pp 328-331
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TLDR
In this paper, line spread functions and energy spectra for commercially produced 123I were obtained on an Anger scintillation camera using three different collimators, including a pinhole collimator.
Abstract
Line-spread functions and energy spectra for commercially produced 123I were obtained on an Anger scintillation camera using three different collimators. Images of a thyroid phantom were also obtained using the same collimators. Although the 529-keV gamma ray of 123I has a relative intensity of only about 1%, it and other high-energy but low-abundance gamma rays seriously degrade images by virtue of septum penetration through thin-wall collimators. Use of the pinhole collimator minimizes this problem.

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Journal ArticleDOI

Deconvolution analysis of the scintillation camera renogram

TL;DR: Analysis of the renogram by deconvolution, using an on-line digital computer, shows promise as a means of expressing renal function in terms of tubular transit times for 123I-Hippuran.
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Collimator Selection for SPECT Brain Imaging: The Advantage of High Resolution

TL;DR: Geometric calculations show that commercially available low-energy, high-resolution cast collimator promise to meet these requirements for brain SPECT, and suggests collimators designed for high resolution, even at substantial cost in sensitivity, are expected to yield significant improvements forbrain SPECT.
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Some physical factors influencing the accuracy of convolution scatter correction in SPECT.

TL;DR: Scatter correction by convolution may be severely hampered by photon statistics when SPECT imaging is done with low-energy photons, so further studies are needed to develop a technique that is capable of handling attenuation and scatter corrections simultaneously.
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Imaging 123I with a scintillation camera. A study of detection performance and quality factor concepts

TL;DR: Image quality, resolution and sensitivity of a scintillation camera equipped with various collimators have been investigated using high purity 123I and the modulation transfer function evaluated from the line spread functions shows a sudden drop at low frequencies for high resolution collimator due to their high degree of septa penetration.
Journal ArticleDOI

Technical considerations in in vivo thyroid studies

TL;DR: In the areas of radiopharmaceuticals, 131I remains a useful agent in selected circumstances, but 99mTc-pertechnetate has become the agent of choice for imaging applications, and Iodine-123 represents an exciting possibility for the future if problems in cost and radiopurity can be solved.
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