Radiation dose to the lens and cataract formation

Henk, J.M.; Whitelocke, R.A.F.; Warrington, Alan P.; Bessell, E.M.

doi:10.1016/0360-3016(93)90310-r

Cited by 121 publications

(60 citation statements)

References 6 publications

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“…Although our head and neck cases did not normally involve the eyes or the lens as critical organs, since these organs are quite far from the field borders, they can come within the fields for brain treatment. The tolerance dose for the lens of the eye are very low, and some studies put it around 5 Gy 26,27,28 . If the prescription dose of a brain case is, say, 50 Gy, and the difference in parotid mean dose between the two planning systems is 2%, which is 1 Gy.…”

Section: Discussionmentioning

confidence: 99%

Dose volume histogram comparison between ADAC Pinnacle and Nomos Corvus systems for IMRT

Ayyangar

Fung

et al. 2005

Australas. Phys. Eng. Sci. Med.

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This paper compares dose volume histograms (DVHs) generated by the ADAC Pinnacle and the Nomos Corvus planning systems. Seven prostate cases and seven head and neck cases were selected for review. Plans computed on both systems possessed exactly the same anatomical contours and IMRT segments. The Pinnacle system used the collapsed cone convolution superposition, while Corvus employed a finite size pencil beam (FSPB) convolution. Prostate DVH results demonstrated similar DVH curves from both systems. For each structure, the ratio of Pinnacle dose value divided by Corvus value was calculated. The high dose structures (which might contain tumour) had ratios close to unity, while the low dose structures (the critical organs) had ratios farther away from unity. Almost all ratios were less than unity, indicating a systematic difference that Pinnacle calculated doses were lower than Corvus ones. Head and neck data provided similar findings. A possible cause for this discrepancy could be the beam modelling. The difference in DVH parameters that we discovered between the two systems was about the same order of magnitude as the measurement-computation difference. When low dose is critical, such difference may affect the clinical planning decision.

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Section: Discussionmentioning

confidence: 99%

Dose volume histogram comparison between ADAC Pinnacle and Nomos Corvus systems for IMRT

Ayyangar

Fung

et al. 2005

Australas. Phys. Eng. Sci. Med.

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show abstract

“…The necessity to apply X-rays is also disadvantageous, but the measured values are far from the critical thresholds for cataract development [11,12,13]. …”

Section: Discussionmentioning

confidence: 99%

Three-Dimensional Rotational Dacryocystography for Imaging of the Lacrimal Draining System and Adjacent Anatomical Structures

et al. 2005

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Purpose: A three-dimensional (3D) rotational angiography system was used to perform 3D dacryocystography (3DRD) as an adjunct to the conventional dacryocystography assisted by digital subtraction angiography (DSA). Methods:In 15 patients with severe epiphora, 3DRD was performed after inconclusive results from DSA-assisted dacryocystography. Results:3DRD was technically feasible and well tolerated in all 15 cases. In 5 out of 15 patients, 3DRD, in contrast to DSA-assisted dacryocystography, distinguished clearly between stenotic lesions of the canaliculi, lacrimal sac or nasolacrimal duct. In 10 cases, the simultaneous display of tear ducts and adjacent structures of the nasal cavity provided critical anatomical information for decision making between endoscopic and open dacryocystorhinostomy. Conclusions: 3DRD is technically feasible and adds important information to conventional DSA-assisted dacryocystography.

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“…두부 CT 검사를 하는 동안 눈은 대략 50 mGy의 방사선량을 받게 되는 것으로 보고되고 있다 [6] . 눈에 서 수정체혼탁, 백내장에 대한 한계선량은 한 번의 노 출에 대해 0.5∼2.0 Sv이며 반복된 노출에 대해서는 0.15 Sv/년으로 보고되고 있다 [7], [8] . 방사선 민감 장기 인 눈에 대한 방사선 노출을 제어하는 것은 시각장애 나 백내장, 소아 환자, 민감한 눈을 가진 환자, 반복적 인 검사가 필요한 환자에서 특히 중요하다 [9] .…”

Section: ⅰ Introductionunclassified

The Evaluation of Eye Dose and Image Quality According to The New Tube Current Modulation and Shielding Techniques in Brain CT

Kwon¹,

Kim²

2015

Journal of the Korean Society of Radiology

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The eye of human is a radiation sensitive organ and this organ should be shielded from radiation exposure during brain CT procedures. In the brain CT procedures, bismuth protector using to reduce the radiation exposure dose for eye. But protecting the bismuth always accompanies problem of the image quality reduction including artifact. This study aim is the eye radiation exposure dose and image quality evaluation of the new tube current modulation such as new organ based-tube current modulation, longitudinal-TCM, angular-TCM between shielding scan technique using bismuth and lead glasses. As a result, radiation dose of eye is reduced 25.88% in new OB TCM technique then reference scan technique and SNR new OB TCM is 6.05 higher than bismuth shielding scan technique and lower than reference scan technique. In clinical brain CT, new OB TCM technique will contribute to reduction of radiation dose for eye without decrease of image quality.

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Radiation dose to the lens and cataract formation

Cited by 121 publications

References 6 publications

Dose volume histogram comparison between ADAC Pinnacle and Nomos Corvus systems for IMRT

Dose volume histogram comparison between ADAC Pinnacle and Nomos Corvus systems for IMRT

Three-Dimensional Rotational Dacryocystography for Imaging of the Lacrimal Draining System and Adjacent Anatomical Structures

The Evaluation of Eye Dose and Image Quality According to The New Tube Current Modulation and Shielding Techniques in Brain CT

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