Efficiency of the cervical lead shield during intraoral radiography

1986 ◽  
Vol 62 (6) ◽  
pp. 732-736 ◽  
Author(s):  
Israel Kaffe ◽  
Mark M. Littner ◽  
Tuvia Shlezinger ◽  
Pnina Segal
Keyword(s):  
Intraoral Radiography ◽  
Lead Shield

scholarly journals University of Kiel Radiocarbon Measurements II

Radiocarbon ◽  
1967 ◽  
Vol 9 ◽  
pp. 257-260
Author(s):  
H. Willkomm ◽  
H. Erlenkeuser
Keyword(s):  
Proportional Counter ◽  
Atmospheric Pressure ◽  
Statistical Error ◽  
Quartz Tube ◽  
Sensitive Volume ◽  
Concrete Wall ◽  
Lead Shield ◽  
Double Ring

Most of the measurements reported here have been obtained with the 4.5-L CO2 counter previously described (Kiel I; Erlenkeuser, 1965). A few samples have been dated with a 3-L proportional counter. The copper counter is surrounded by 28 GM counters in the form of a double ring. The total assembly is shielded by 10 cm of old lead. Neither an inner lead shield between counter and anticoincidence ring nor screening of sensitive volume by a quartz tube-as in the 4.5-L counter-has been used. Background of the small counter is 17.20 cpm or The 0.95 x NBS value is 9.5 cpm at 400 torr. Within statistical error background does not depend on atmospheric pressure. The 3-L counter is placed under a concrete wall, 2.5 m in length and 9.4 m in height.

scholarly journals Ambient dose during intraoral radiography with current techniques: Part 1 conversion factor for scattered radiation using a rectangular collimator

2018 ◽  
Vol 47 (7) ◽  
pp. 20180108
Author(s):  
Reinier C Hoogeveen ◽  
Tyrell I de Randamie ◽  
Gianni M Soemodihardjo ◽  
WER Berkhout
Keyword(s):  
Scattered Radiation ◽  
Conversion Factor ◽  
Intraoral Radiography ◽  
Ambient Dose

Influence of overlying soft tissues on radiographic absorptiometry in intraoral radiography

2005 ◽  
Vol 21 (2) ◽  
pp. 69-73
Author(s):  
Mikiko Furukawa ◽  
Masahiro Izumi ◽  
Toshimitsu Hishikawa ◽  
Toshihide Noguchi ◽  
Eiichiro Ariji
Keyword(s):  
Soft Tissues ◽  
Intraoral Radiography ◽  
Radiographic Absorptiometry

History of Digital Detectors in Intraoral Radiography

2018 ◽  
Vol 04 (02) ◽  
Author(s):  
Midori Yoshida ◽  
Hozumi Yoshihara ◽  
Eiichi Honda
Keyword(s):  
Intraoral Radiography ◽  
History Of

A PHANTOM STUDY SHOWING THE IMPORTANCE OF BREAST SHIELDING DURING HEAD CT

2020 ◽  
Vol 188 (4) ◽  
pp. 464-469 ◽  
Author(s):  
Nika Zalokar ◽  
Nejc Mekiš
Keyword(s):  
Computed Tomography ◽  
Dose Reduction ◽  
Phantom Study ◽  
Anthropomorphic Phantom ◽  
Head Ct ◽  
Lead Shield ◽  
Phantom Measurements ◽  
Lead Shielding ◽  
Head Computed Tomography

Abstract This study aimed to investigate the dose to the breasts during head computed tomography (CT) if lead shielding is used. The study was performed in two major hospitals using helical and axial protocols on an anthropomorphic phantom. Measurements were performed with and without the use of a lead shield of 0.5 mm equivalent density. The results showed a significant decrease in dose with the lead shielding in both hospitals. During the helical protocol, the use of shielding significantly reduced the dose by 96% in Hospital A and 82% in Hospital B. The dose reduction during axial protocol was also significant: 95% in Hospital A and 86% in Hospital B with lead shielding. Considering the significant dose reduction of 82% up to 96% during this study, we highly recommend the shielding of breasts regardless of the protocol used during head CT examinations.

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