PROBLEM TO BE SOLVED: To provide an imaging field confirmation plate of a revolving arm type dental X-ray CT diagnostic system enabling a photographer to check simply and easily by visual perception to which region the outer edge of the imaging field is extended, and capable of expecting accuracy of radiography of dentition.SOLUTION: An imaging field confirmation plate 1 placed on a bite plate 37 for positioning dentition of a patient arranged on an X-ray imaging region of a revolving arm type dental X-ray CT diagnostic system 11 has a constitution comprising a transparent plate 2 on which a cross line CL is drawn, which shows two circles C1 and C2 having large and small diameters which are the same as large and small imaging fields viewed from the rotation center axis direction of a revolving arm 21 and the center O thereof.COPYRIGHT: (C)2014,JPO&INPIT【課題】本発明は、撮影視野の外縁がどの領域までかを撮影者が視覚により簡略容易に確認でき、歯列のX線撮影の正確性を期すことができる回転アーム型歯科用X線CT診断装置の撮影視野確認プレートを提供する。【解決手段】本発明は、回転アーム型歯科用X線CT診断装置11のX線撮影領域に配置される患者の歯列位置決め用のバイトプレート37上に載置する撮影視野確認プレート1であって、回転アーム21の回転中心軸方向から見た大小の撮影視野と同じ大小二つの直径の円C1、C2及びその中心Oを表す十字線CLを描いた透明板2からなる構成としたものである。【選択図】図11
