CBCT Dose Reduction to Lens of Eye Using Leaded Glasses

Objectives: The objective of this study was to measure the shielding effect of leaded glasses, tanning glasses with 1/16” Pb shielding and tanning glasses with lead foil in combination with thyroid collar compared with no shielding equipment to the lens of the eye to evaluate the percentage of dose reduction. Methods: A CIRS female phantom head was used to measure the patient radiation dose to the organs of the head and neck from a Morita X800 CBCT using nano Dot optically stimulated luminescent dosimeters (OSL’S) placed at 23 head and neck sites. Leaded glasses, tanning glasses with 1/16” Pb shielding, tanning glasses with lead foil were placed over the phantoms eyes in conjunction with a thyroid collar. No Protective Equipment was used as a control. Radiation was performed using manufacturers predetermined exposure settings. All dosimeters were exposed three times. Radiation dose fractions to various organ sites were determined using reference values from ICRP-89. Organ equivalent doses were based on ICRP-103 tissue weighting factors. Results: The per cent reduction to the lens of the eye for the leaded glasses compared to no Protective Equipment was 49.2%, 44.6% for the tanning glasses with 1/16” Pb shielding and 38.1% for the tanning glasses with lead foil. For all modes of eye wear the highest organ doses were seen in the salivary glands, extrathoracic airway, and the oral mucosa. The use of proper PPE is necessary to protect the eye from possible cataractogenesis. Conclusions: Research on the correlation between cataract formation and ionizing radiation has shown that the dosage and frequency of exposure play a role in damaging the DNA in the lens of the eye. Here we demonstrate that regular leaded glasses and the tanning glasses with 1/16”Pb shielding are about equal in reducing the dose to the lens of the eye. One caviat, the size of the regular lead glasses might interfere with anatomical landmarks while tanning glasses would allow more diagnostic information. Further studies should be performed.

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Feasibility of low-dose digital pulsed video-fluoroscopic swallow exams (VFSE): effects on radiation dose and image quality

Acta Radiologica ◽

10.1177/0284185116685924 ◽

2017 ◽

Vol 58 (9) ◽

pp. 1037-1044 ◽

Cited By ~ 1

Author(s):

Jakob Weiss ◽

Mike Notohamiprodjo ◽

Klement Neumaier ◽

Minglun Li ◽

Wilhelm Flatz ◽

...

Keyword(s):

Image Quality ◽

Radiation Dose ◽

Dose Reduction ◽

Low Dose ◽

Research Evaluation ◽

Diagnostic Image Quality ◽

Organ Doses ◽

Dose Area Product ◽

Thermoluminescent Dosimeters ◽

Area Product

Background Fluoroscopy is a frequently used examination in clinical routine without appropriate research evaluation latest hardware and software equipment. Purpose To evaluate the feasibility of low-dose pulsed video-fluoroscopic swallowing exams (pVFSE) to reduce dose exposure in patients with swallowing disorders compared to high-resolution radiograph examinations (hrVFSE) serving as standard of reference. Material and Methods A phantom study (Alderson-Rando Phantom, 60 thermoluminescent dosimeters [TLD]) was performed for dose measurements. Acquisition parameters were as follows: (i) pVFSE: 76.7 kV, 57 mA, 0.9 Cu mm, pulse rate/s 30; (ii) hrVFSE: 68.0 kV, 362 mA, 0.2 Cu mm, pictures 30/s. The dose area product (DAP) indicated by the detector system and the radiation dose derived from the TLD measurements were analyzed. In a patient study, image quality was assessed qualitatively (5-point Likert scale, 5 = hrVFSE; two independent readers) and quantitatively (SNR) in 35 patients who subsequently underwent contrast-enhanced pVFSE and hrVFSE. Results Phantom measurements showed a dose reduction per picture of factor 25 for pVFSE versus hrVFSE images (0.0025 mGy versus 0.062 mGy). The DAP (µGym2) was 28.0 versus 810.5 (pVFSE versus hrVFSE) for an average examination time of 30 s. Direct and scattered organ doses were significantly lower for pVFSE as compared to hrVFSE ( P < 0.05). Image quality was rated 3.9 ± 0.5 for pVFSE versus the hrVFSE standard; depiction of the contrast agent 4.8 ± 0.3; noise 3.6 ± 0.5 ( P < 0.05); SNR calculations revealed a relative decreased of 43.9% for pVFSE as compared to hrVFSE. Conclusion Pulsed VFSE is feasible, providing diagnostic image quality at a significant dose reduction as compared to hrVFSE.

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THE EFFICACY OF RADPAD AS A RADIATION PROTECTION TOOL IN CT FLUOROSCOPY GUIDED LUNG BIOPSIES

Radiation Protection Dosimetry ◽

10.1093/rpd/ncaa169 ◽

2020 ◽

Vol 191 (3) ◽

pp. 328-334 ◽

Cited By ~ 1

Author(s):

Michael Lawson ◽

Ahilan Kuganesan ◽

Georgia Parry ◽

Mohamed Khaldoun Badawy

Keyword(s):

Radiation Dose ◽

Dose Reduction ◽

Personal Protective Equipment ◽

Cost Effective ◽

Whole Body ◽

Protective Equipment ◽

Computed Tomography Fluoroscopy ◽

Effective Option ◽

Single Use ◽

Lung Biopsies

Abstract Computed tomography fluoroscopy is now the preferred technique for percutaneous lung biopsies. However, concern regarding operator and patient radiation dose remains, which warrants further exploration into dose optimisation tools. This phantom-study aims to assess the dose reduction capabilities of RADPAD, a single-use patient drape designed to decrease staff exposure to scattered radiation. Dosemeters at the waist and eye levels were used to determine the whole-body and lens exposure during simulated lung biopsy procedures while using RADPAD and other combinations of personal protective equipment. RADPAD resulted in a 36% and 38% dose reduction for whole-body and eye exposure, respectively. However, when used in combination with radioprotective eyewear and aprons, RADPAD did not reduce the radiation dose further. Consequently, the use of standard personal protective equipment is a more cost-effective option for staff dose reduction. RADPAD is useful in the reduction of radiation dose to unprotected regions.

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Radiation Dose Reduction with the Use of Oral Stent in Radiotherapy for Head and Neck Cancer

Oral Surgery Oral Medicine Oral Pathology and Oral Radiology ◽

10.1016/j.oooo.2018.02.180 ◽

2018 ◽

Vol 126 (3) ◽

pp. e70

Author(s):

Claudia Joffily Parahyba ◽

Elton Trigo Teixeira Leite ◽

Cecília Maria Kalil Haddad ◽

Ana Cristina Froelich Aló Nesrallah ◽

William Alves Pinto Dos Santos ◽

...

Keyword(s):

Head And Neck Cancer ◽

Radiation Dose ◽

Head And Neck ◽

Dose Reduction ◽

Neck Cancer ◽

Radiation Dose Reduction

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Raise the Bar and Lower the Dose: Current and Future Strategies for Radiation Dose Reduction in Head and Neck Imaging

American Journal of Neuroradiology ◽

10.3174/ajnr.a3473 ◽

2013 ◽

Vol 35 (4) ◽

pp. 619-624 ◽

Cited By ~ 18

Author(s):

M. Ibrahim ◽

H. Parmar ◽

E. Christodoulou ◽

S. Mukherji

Keyword(s):

Radiation Dose ◽

Head And Neck ◽

Dose Reduction ◽

Radiation Dose Reduction ◽

Head And Neck Imaging

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Radiation Dose Reduction Methods For Use With Fluoroscopic Imaging, Computers And Implications For Image Quality

10.1117/12.968766 ◽

1988 ◽

Author(s):

E. W. Edmonds ◽

D. M. Hynes ◽

J. A. Rowlands ◽

B. D. Toth ◽

A. J. Porter

Keyword(s):

Image Quality ◽

Radiation Dose ◽

Dose Reduction ◽

Radiation Dose Reduction ◽

Fluoroscopic Imaging ◽

Reduction Methods

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Is radiation dose reduction the right answer for HPV-positive head and neck cancer?

Oral Oncology ◽

10.1016/j.oraloncology.2013.09.015 ◽

2014 ◽

Vol 50 (6) ◽

pp. 560-564 ◽

Cited By ~ 29

Author(s):

Randall J. Kimple ◽

Paul M. Harari

Keyword(s):

Head And Neck Cancer ◽

Radiation Dose ◽

Head And Neck ◽

Dose Reduction ◽

Neck Cancer ◽

Radiation Dose Reduction ◽

The Right

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Clinical application of radiation dose reduction for head and neck CT

European Journal of Radiology ◽

10.1016/j.ejrad.2018.08.021 ◽

2018 ◽

Vol 107 ◽

pp. 209-215 ◽

Cited By ~ 14

Author(s):

Hidetake Yabuuchi ◽

Takeshi Kamitani ◽

Koji Sagiyama ◽

Yuzo Yamasaki ◽

Yuko Matsuura ◽

...

Keyword(s):

Radiation Dose ◽

Head And Neck ◽

Dose Reduction ◽

Clinical Application ◽

Radiation Dose Reduction

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Radiation Minimisation and Outcome Maximisation in Cardiac Computed Tomograpy

European Cardiology Review ◽

10.15420/ecr.2010.6.1.15 ◽

2010 ◽

Vol 6 (1) ◽

pp. 15

Author(s):

James P Earls ◽

Jonathon A Leipsic ◽

◽

Keyword(s):

Radiation Dose ◽

Dose Reduction ◽

New Technologies ◽

Cardiac Computed Tomography ◽

Substantial Reduction ◽

Radiation Doses ◽

Tube Current ◽

Prospective Triggering ◽

Effective Radiation ◽

Selection Of

Recent reports have raised general awareness that cardiac computed tomography (CT) has the potential for relatively high effective radiation doses. While the actual amount of risk this poses to the patient is controversial, the increasing concern has led to a great deal of research on new CT techniques capable of imaging the heart at substantially lower radiation doses than was available only a few years ago. Methods of dose reduction include optimised selection of user-defined parameters, such as tube current and voltage, as well as use of new technologies, such as prospective triggering and iterative reconstruction. These techniques have each been shown to lead to substantial reduction in radiation dose without loss of diagnostic accuracy. This article will review the most frequently used and widely available methods for radiation dose reduction in cardiac CT and give practical advice on their use and limitations.

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