Lens Dose Reduction by Patient Posture Modification During Neck CT

Mosher, E; Butman, John A.; Folio, Les; Biassou, Nadia; Lee, Choonsik

doi:10.2214/ajr.17.18261

Cited by 12 publications

(3 citation statements)

References 19 publications

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“…or implantable electric devices (pacemaker, implantable cardioverter–defibrillator, etc.) are near the scan range, operators should pay particular attention to the scan parameters . Mosher et al objectively evaluated the exposure dose of neck CT by using a computer simulation.…”

Section: Discussionmentioning

confidence: 99%

“…are near the scan range, operators should pay particular attention to the scan parameters . Mosher et al objectively evaluated the exposure dose of neck CT by using a computer simulation. We aimed to reduce the exposure dose of radiosensitive organs by changing the position of the neck and scan parameters in neck CT, and the results showed that the overranging greatly influenced the eye‐lens dose.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Overranging and overbeaming measurement in area detector computed tomography: A method for simultaneous measurement in volume helical acquisition

Urikura

Hara

Yoshida

et al. 2019

J Applied Clin Med Phys

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Purpose We propose a novel method to assess overbeaming and overranging, as well as the effect of reducing longitudinal exposure range, by using a dynamic z‐collimator in area detector computed tomography. Methods and materials A 500‐mm diameter cylindrical imaging plate was exposed by helical scanning in a dark room. The beam collimation of the helical acquisitions was set at 32 and 80 mm. Overbeaming and overranging with the dynamic z‐collimator were measured. Results The actual beam widths were approximately 39 and 88 mm at 32 and 80 mm collimation, respectively, and were relatively reduced owing to increased beam collimation. Overranging was 27.0 and 48.2 mm with a pitch of 0.83 and 1.49 at 32 mm collimation and 72.5 and 83.1 mm with a pitch of 0.87 and 0.99 at 80 mm collimation. The dynamic z‐collimator relatively reduced the overranging by 17.3% and 17.1% for the 32 and 80 mm collimation, respectively. Conclusion We devised a method to simultaneously measure overbeaming and overranging with only one helical acquisition. Although the dynamic z‐collimator reduced the overranging by approximately 17%, wider collimation widths and higher pitch settings would increase the exposure dose outside the scan range.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Overranging and overbeaming measurement in area detector computed tomography: A method for simultaneous measurement in volume helical acquisition

Urikura

Hara

Yoshida

et al. 2019

J Applied Clin Med Phys

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“…Even gantry tilting and patient set-up seem to significantly affect eye lens dose [9]. Such simple measures, such as modifying the neck position, shortening the scanning range and reducing the tube potential could decrease the dose to the lens by 89% [11].…”

Section: Ophthalmic Effects In Irradiated Children and Individuals Exmentioning

confidence: 99%

Radiation-Induced Cerebro-Ophthalmic Effects in Humans

Loganovsky

Marazziti

Fedirko

et al. 2020

Life

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Exposure to ionizing radiation (IR) could affect the human brain and eyes leading to both cognitive and visual impairments. The aim of this paper was to review and analyze the current literature, and to comment on the ensuing findings in the light of our personal contributions in this field. The review was carried out according to the PRISMA guidelines by searching PubMed, Scopus, Embase, PsycINFO and Google Scholar English papers published from January 2000 to January 2020. The results showed that prenatally or childhood-exposed individuals are a particular target group with a higher risk for possible radiation effects and neurodegenerative diseases. In adulthood and medical/interventional radiologists, the most frequent IR-induced ophthalmic effects include cataracts, glaucoma, optic neuropathy, retinopathy and angiopathy, sometimes associated with specific neurocognitive deficits. According to available information that eye alterations may induce or may be associated with brain dysfunctions and vice versa, we propose to label this relationship “eye-brain axis”, as well as to deepen the diagnosis of eye pathologies as early and easily obtainable markers of possible low dose IR-induced brain damage.

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