THE PRECISE METHODS FOR THE MEASUREMENT OF COLLIMATOR HOLE ANGULATIONS AND CENTER OF ROTATION OF SPECT WITH ADAPTIVE QUALITY CONTROL PHANTOM

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ZAMANI ZEINALI HOSSEIN; MORADKHANI -; AALIPOUR ANITA; MAJDABADI ABASS

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Journal Paper

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Journal: Iranian Journal of Nuclear Medicine Year:2010 | Volume:18 | Issue:SUPPLEMENT 1 Page(s): 42-42

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Title

THE PRECISE METHODS FOR THE MEASUREMENT OF COLLIMATOR HOLE ANGULATIONS AND CENTER OF ROTATION OF SPECT WITH ADAPTIVE QUALITY CONTROL PHANTOM

Author(s)

ZAMANI ZEINALI HOSSEIN | MORADKHANI - | AALIPOUR ANITA | MAJDABADI ABASS

Keywords

QUALITY CONTROL

NUCLEAR MEDICINE

PHANTOM

Abstract

Introduction: The Adaptive QUALITY CONTROL PHANTOM (AQCP) is the computer-controlled PHANTOM which positions and moves a radioactive source in the Field of View (FOV) of an imaging NUCLEAR MEDICINE device on a definite path to produce any spatial distribution of gamma rays to perform the QC Tests such as the Collimator Hole Angulation (CHA) and the Center OF Rotation (COR) of Single Photon Emission Computer Tomography (SPECT).Methods: The collimator hole angulation for three collimators were measured with the method by using a point source and computer-controlled cylindrical positioning. In this method the displacement of the image of a point source examined as the AQCP move point source vertically away from the collimator face. A new method for center of rotation assessment by AQCP is introduced and the results of this proposed method as compared with the routine QC test (IAEA-TECDOC-602 method) and their differences are discussed in detail.Results: The results of the high-accuracy measurement method of CHA show that the measurement accuracy for absolute angulation errors is better than ±0.024°. The Root Mean Square (RMS) of CHA for LEHR, LEHS and LEUHR collimators were measured to be 0.290°, 0.292° and 0.208° respectively. In addition, it has been proved and established that the precise measurement of the distance of the point source movement vertically away from the collimator face has had a great effect on the CHA measurement. It is to be added in this connection that the measured RMS of CHA for LEHR collimator with the distance variation from the collimator's surface+/-1 mm has been varied+/-0.04 degree.Conclusion: Based on such comparison between the two afore-described methods, it proofs the mechanical problems of detector rotation should be considered as the main cause of the difference between the two methods under consideration. We defined and measured a new parameter called Dynamic Mechanical Error (DME) for applying the gantry motion correction.

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APA: Copy

ZAMANI ZEINALI, HOSSEIN, MORADKHANI, -, AALIPOUR, ANITA, & MAJDABADI, ABASS. (2010). THE PRECISE METHODS FOR THE MEASUREMENT OF COLLIMATOR HOLE ANGULATIONS AND CENTER OF ROTATION OF SPECT WITH ADAPTIVE QUALITY CONTROL PHANTOM. IRANIAN JOURNAL OF NUCLEAR MEDICINE, 18(SUPPLEMENT 1), 42-42. SID. https://sid.ir/paper/590515/en

Vancouver: Copy

ZAMANI ZEINALI HOSSEIN, MORADKHANI -, AALIPOUR ANITA, MAJDABADI ABASS. THE PRECISE METHODS FOR THE MEASUREMENT OF COLLIMATOR HOLE ANGULATIONS AND CENTER OF ROTATION OF SPECT WITH ADAPTIVE QUALITY CONTROL PHANTOM. IRANIAN JOURNAL OF NUCLEAR MEDICINE[Internet]. 2010;18(SUPPLEMENT 1):42-42. Available from: https://sid.ir/paper/590515/en

IEEE: Copy

HOSSEIN ZAMANI ZEINALI, - MORADKHANI, ANITA AALIPOUR, and ABASS MAJDABADI, “THE PRECISE METHODS FOR THE MEASUREMENT OF COLLIMATOR HOLE ANGULATIONS AND CENTER OF ROTATION OF SPECT WITH ADAPTIVE QUALITY CONTROL PHANTOM,” IRANIAN JOURNAL OF NUCLEAR MEDICINE, vol. 18, no. SUPPLEMENT 1, pp. 42–42, 2010, [Online]. Available: https://sid.ir/paper/590515/en

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