Radiation exposure during panoramic radiography in children

Myers, David R.; Shoaf, H. Kenneth; Wege, William R.; Carlton, William H.; Gilbert, Marcus A.

doi:10.1016/0030-4220(78)90390-0

Cited by 20 publications

(10 citation statements)

References 21 publications

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“…9 Thyroid doses for paediatric panoramic tomography have been reported as ranging from 0.10 to 0.29 mGy 11 and from 0.53 mGy decreasing to 0.23 mGy with a leadprotective thyroid collar. 10 Measurements for cephalometric radiography range from 0.34 to 0.73 mGy 11 with similar reductions to those reported above with the use of a thyroid collar.…”

Section: Discussionsupporting

confidence: 72%

“…Direct measurement of thyroid dose using TLD inserted into suitable anthropomorphic phantoms, has been reported in the dental literature. [9][10][11] An attempt was made to make use of this approach using a Rando phantom. 18 Difficulty was experienced as the rigid phantom could not be positioned to simulate the shoulder, head and neck positioning used in either the CC or MLO mammographic projections.…”

Section: Discussionmentioning

confidence: 99%

“…Relevant to the above dental studies 10,11 is that the radiosensitivity of the thyroid gland in children is considered to be higher than in adults. 11,19 The literature examining the effect of medical diagnostic exposure on the thyroid is sparse, with no report of increased risk of thyroid cancer for adults.…”

Section: Discussionmentioning

confidence: 99%

“…Examination of computed tomography (CT) images and available literature indicated that this position was the one with the least amount of attenuating material (typically 10 mm) overlying the thyroid. [9][10][11][13][14][15][16] The detectors were left in place for the entire mammographic procedure irrespective of the number of films involved, except on 1 day of measurement (day 3) where scatter from only the first four films (two craniocaudal (CC) and two mediolateral-oblique (MLO)) was measured. Radiographic details, including kilovolt peak (kVp), target/ filter combination and mAs were recorded for each projection.…”

Section: Methodsmentioning

confidence: 99%

“…Typical thyroid doses for these procedures, particularly those in dentistry, have been documented in the literature. [9][10][11] Thyroid dose is also of concern to clinicians performing radiological examinations, particularly in cardiology. 12 Standard texts describe the dose to the thyroid during mammography as negligible, 5,6 but this result appears to be based on calculations of data from Jensen and Butler who used procedural geometry and equipment that differs significantly from that used today.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of thyroid dose due to mammography

Whelan

McLean

Poulos

1999

Australasian Radiology

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The radiation dose to the skin overlying the thyroid was measured for 91 women undergoing routine mammographic screening. Measurement was made over 6 days using thermoluminescent dosimeter (TLD) detectors taped appropriately to the neck. An average skin dose of 0.39 +/- 0.22 mGy per mammographic examination was measured with measurements ranging from background levels to 1.15 mGy. The average dose was significantly correlated to the milliampere-seconds for a total procedure. The mediolateral-oblique view was found to give a 2.4-fold greater skin dose at the thyroid than the craniocaudal view. After considering depth dose data from the literature it was conservatively estimated that the dose to the thyroid gland might be 10% of the skin dose overlying the thyroid. This corresponds to an average thyroid dose during mammography of approximately 0.04 mGy which is considered insignificant compared with the average breast dose (4 mGy) and in light of the relevant available literature on the risk to the thyroid.

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Section: Discussionsupporting

confidence: 72%

Section: Discussionmentioning

confidence: 99%