巻号一覧
15 巻 (1975)
- 3 号 p. 163-
- 2 号 p. 49-
- 1 号 p. 1-
15 巻, 1 号
選択された号の論文の8件中1～8を表示しています
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相沢 恒, 値賀 秀博, 長田 寛, 武田 恒孝, 丸橋 一夫, 見村 伸, 佐藤 精明, 西岡 敏雄, 安藤 正一1975 年 15 巻 1 号 p. 1-5
発行日: 1975/03/30
公開日: 2010/10/21
ジャーナル フリーChance of taking orthopantomography and/or dental full mouth technique at the first visit examination are rapidly increasing for the development of systemic dental treatment. Threfore the accurate evaluation should be done of the radiation dose of both radiographic techniques.
The purpose of present study is to examine and evaluate skin dose and depth dose distributions for them comparatively in maxillofacial region and some adjacent organs. The phantom which we used was Alderson's Rando Phantom. TLD (Mg2SiO4: Tb, Ceramic) was used for the measurement of radiation dose, and Kodack Type M film and TLD: Tbwere used for the depth dose distributions in head and neck region.
The results from present study were as follows.
1) The skin dose resulting from dental full mouth technique with fourteen films were recorded generally higher value than of orthopantomography. Especially maximum dose value was presented in premolar region (Fig.3 and Tab.2).
2) The dose in several organs were also recorded generally higher value in dental full mouth technique than of orthopantomography except the obtained data from in thyroid grand and in posterior aera of tongue corresponding to rotating center of orthopantomography (Tab.3).
3) According the dose distribution curve in occlusal plane level, there exist higher dose distribution areas corresponding to rotating centers of orthopantomographic movement than of dental full mouth technique.抄録全体を表示PDF形式でダウンロード (1034K) -
飯久保 正雄, 佐藤 裏司, 西山 新一, 長田 寛, 佐藤 精明, 安藤 正一1975 年 15 巻 1 号 p. 6-16
発行日: 1975/03/30
公開日: 2010/10/21
ジャーナル フリーTomography is very useful technique for radiographic examination in maxillofacial region. However the interpretation of clinical tomogram with atrocious blurring is always so difficult because of the complexity of tomographic image formation.
The purpose of present study is to basically analyze the tomographic image formation, specially attending the mechanism of radiographic contour development. The apparatus used was Polytome Type U.
A human dry skull was tomographed by four different focal movements. Great differences on contour manifestation were found among each tomograms eventhough their tomographic plane were adjusted at the same level.
It may be emphasized that one of the most important factor of forming sharp contour is the difference of interrelationship between a tomographic angle and a shape of object.
Fundamental examination by means of a spherical object revealed the fact that spurious contour arising from outside the tomographic plane was clealy shown instead of true contour arising from the tomographic plane.Practical examination by means of an egg as indefinite sphere material demonstrated the difference between true contour and spurious contour and showed special characteristics of contour formed by different focal movements. Furthermore, a piece of cow bone which was horizontally devided into three blocks was tomographed under various conditions and comparative evaluations of each tomograms were done.
The results from our present study suggested that the routine manner for observing tomogram might be led an misinterpretation because of remarkable differences between the actual finding and its tomographic image effect.抄録全体を表示PDF形式でダウンロード (3984K) -
とくに顎関節部側方撮影へのアプローチ飯久保 正雄, 佐藤 嚢司, 白根 茂光, 鈴木 滋, 佐藤 精明, 堀田 一男1975 年 15 巻 1 号 p. 17-23
発行日: 1975/03/30
公開日: 2010/10/21
ジャーナル フリーZonography named by Ziedses des Plantes in 1931 is tomography with very narrow exposure angle of only a few degree.
Consequently the radiographic result of zonography is presented as a zone with slight blurring, while in conventional tomography cross section image can be obtained. Recently, D. Westra has widely studied on zonographic image effect differed from conventional radiography or coventional tomography and applied it to clinical examination. However, very few investigations have done on it in dental field.
The puropose of present study is to analyze zonographic image formation practically under the theory by D. Westra and to examine the uses of zonographic technique to dentomaxillofacial region, specially approaching to TM joint survey.
The result from present study revealed that zonogram with slight blurring is more simillar to the shadow effect in conventional radiogram than that of conventional tomogram. Therefore the contrast and sharpness of zonogram are superior to that of conventional tomogram. But adequate exposure angle for radiogaphic purpose and indication of zonogra-phic technique should be reconsidered in dentomaxillofacial region.
Zonographic technique may be so useful for surverying TM joint that zonogram shows excellent picture of the region related to occlusal relationship in molar region if the quality of zonographic image and simplifying of positioning of patient can be improved.抄録全体を表示PDF形式でダウンロード (2286K) -
加藤 譲治1975 年 15 巻 1 号 p. 24-27
発行日: 1975/03/30
公開日: 2010/10/21
ジャーナル フリーPDF形式でダウンロード (1124K) -
野上 健雄, 神田 重信, 竹田 正宗1975 年 15 巻 1 号 p. 28
発行日: 1975/03/30
公開日: 2010/10/21
ジャーナル フリーPDF形式でダウンロード (714K) -
1975 年 15 巻 1 号 p. 29-38
発行日: 1975/03/30
公開日: 2010/10/21
ジャーナル フリーPDF形式でダウンロード (1779K) -
1975 年 15 巻 1 号 p. 39
発行日: 1975年
公開日: 2010/10/21
ジャーナル フリーPDF形式でダウンロード (352K) -
1975 年 15 巻 1 号 p. 42
発行日: 1975/03/30
公開日: 2011/06/03
ジャーナル フリーPDF形式でダウンロード (136K)
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