title: Patient setup verification procedure for a portal image in a computed radiography system with a high-resolution liquid-crystal display monitor.
abstract: In our conventional visual inspection for setup verification, we have routinely used a console monitor of a CR system and a monitor of a treatment-planning system (i.e., the separate-monitor method) in order to avoid the need for CR portal-film generation. However, the separate-monitor method provided insufficient precision in detecting setup errors. We devised a setup verification procedure that uses a high-resolution liquid-crystal display monitor (i.e., the single-monitor method). Our objective in the present study was to evaluate the precision of the single-monitor method. These two methods were compared in terms of the precision of visual inspection. The single-monitor method was significantly superior to the separate-monitor method in sensitivity and in the magnitude of the discrepancy that could not be detected. The single-monitor method provides higher precision in visual inspection than does the separate-monitor method, and is a useful verification procedure.
authors.affiliation: Department of Radiology, Osaka Prefectural Medical Center for Respiratory and Allergic Diseases, Habikino, Osaka, Japan. hima71f@zeus.eonet.ne.jp
authors.forename: Hideki
authors.initials: H
authors.lastname: Fujita
authors.forename: Michihiro
authors.initials: M
authors.lastname: Yamaguchi
authors.forename: Yuichi
authors.initials: Y
authors.lastname: Bessho
authors.forename: Tomio
authors.initials: T
authors.lastname: Fujioka
authors.forename: Haruyuki
authors.initials: H
authors.lastname: Fukuda
authors.forename: Kenya
authors.initials: K
authors.lastname: Murase
mesh_terms: D003626:Data Display; D006801:Humans; D007091:Image Processing, Computer-Assisted; D050866:Liquid Crystals; D019300:Medical Errors / Q000517:prevention & control; D011856:Radiographic Image Enhancement / Q000295:instrumentation*; D011881:Radiotherapy, Computer-Assisted / Q000295:instrumentation*; D012189:Retrospective Studies; D013997:Time Factors
references.citation: Br J Radiol. 2005 Jun;78(930):519-27
references.pmid: 15900057
references.citation: Int J Radiat Oncol Biol Phys. 1995 Apr 30;32(1):227-33
references.pmid: 7721620
references.citation: Int J Radiat Oncol Biol Phys. 2002 Sep 1;54(1):270-7
references.pmid: 12183001
references.citation: Comput Biol Med. 2008 Jan;38(1):90-100
references.pmid: 17825815
references.citation: Med Phys. 2004 Nov;31(11):2978-88
references.pmid: 15587650
references.citation: Med Phys. 2006 Nov;33(11):4258-70
references.pmid: 17153404
references.citation: Br J Radiol. 2009 Jun;82(978):504-8
references.pmid: 19153183
references.citation: Radiother Oncol. 2008 Sep;88(3):289-309
references.pmid: 18706727
references.citation: Med Phys. 1994 Apr;21(4):581-618
references.pmid: 8058027
references.citation: Nihon Hoshasen Gijutsu Gakkai Zasshi. 2006 Jan 20;62(1):130-5
references.pmid: 16456514
references.citation: Int J Radiat Oncol Biol Phys. 2007 Apr 1;67(5):1568-77
references.pmid: 17394951
references.citation: Int J Radiat Oncol Biol Phys. 1999 Sep 1;45(2):529-34
references.pmid: 10487581
references.citation: J Exp Clin Cancer Res. 2007 Mar;26(1):125-32
references.pmid: 17550141
references.citation: Int J Radiat Oncol Biol Phys. 1993 Sep 30;27(2):437-47
references.pmid: 8407420
references.citation: Int J Radiat Oncol Biol Phys. 2005 Oct 1;63(2):610-4
references.pmid: 16095848
references.citation: Phys Med Biol. 2007 Apr 21;52(8):2157-70
references.pmid: 17404461