Image quality and radiation exposure in 320-row temporal bone computed tomography

Bauknecht, Hans-Christian; Siebert, Eberhard; Dannenberg, Andrew J.; Böhner, Georg; Jach, Cornelia; Diekmann, Susanne; Scheurig, C.; Klingebiel, Randolf

doi:10.1259/dmfr/14139527

Cited by 22 publications

(14 citation statements)

References 15 publications

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“…Our results showed a SNR less pronounced in WV mode than helical, but in accordance with other studies [3,16] it is negligible . Duplicated excretory system with a urinary stone in the upper part of the lower excretory system.…”

Section: Discussionsupporting

confidence: 93%

Quantitative and qualitative evaluation of the Wide Volume (WV) versus Helical acquisition on a 320-detector row computed tomography for the exploration of the abdominopelvic region in adults

Roy¹,

Quin²,

Labani³

et al. 2017

Radiol Diagn Imaging

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Section: Discussionsupporting

confidence: 93%

Quantitative and qualitative evaluation of the Wide Volume (WV) versus Helical acquisition on a 320-detector row computed tomography for the exploration of the abdominopelvic region in adults

Roy¹,

Quin²,

Labani³

et al. 2017

Radiol Diagn Imaging

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“…Studies on early DSCT generations demonstrated a lesser radiation dose than MDCT, with equivalent or lesser image quality . The 3rd generation of DSCT was produced with no z ‐axis filter and novel IR technology, which promoted a statistically significant reduction in ED compared to earlier generations .…”

Section: Discussionmentioning

confidence: 99%

Dose reduction in CT imaging for facial bone trauma in adults: A narrative literature review

Hooper

Eccles

Milliken

et al. 2019

J of Medical Radiation Sci

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Trauma to the facial area accounts for a significant number of admissions to the emergency department. Diagnostic imaging is almost always required, and is critical in determining patient management. Multi‐detector computed tomography (MDCT) appears consistently in the literature as the gold‐standard imaging modality for facial bones, but results in a high radiation dose to the patient. This makes the application and advancement of dose reduction and dose optimisation methods vital. This narrative review presents a critical analysis of the literature concerning diagnostic imaging of facial bone trauma, with an emphasis on dose reduction methods for MDCT. Databases including Pubmed, Medline, Web of Science and Scopus were used to investigate this topic, with the key words: facial bone trauma, computed tomography (CT) imaging and dose reduction. Exclusion criteria included studies on nasal bone fracturing, dental imaging, elective surgeries and paediatric imaging. The literature shows overwhelming support for MDCT, given its accuracy, efficiency and ease of operation. Noise reducing reconstruction algorithms show promise as a successful method of dose reduction in facial bone imaging. Investigations of more innovative techniques also appear within the literature, including diagnostic cone‐beam CT (CBCT), intraoperative CBCT and dual‐source CT (DSCT), but further research is required to confirm their clinical value.

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“…Moreover, to obtain an accurate vertical incidence of the x-ray to the detection area plane of the dosimeter at the respective locations, we calculated the slant angles of the detection area plane at the respective longitudinal beam locations based on DICOM tag information and few previous reports. 1,24,25 As a result of calculation, the slant angles of the detection area plane in the RTI Piranha dosimeter were as follows: 256-row ADCT, 2.7°( ±30 mm), 5.5°(±60 mm), and 6.8°(±75 mm); 320-row ADCT, 2.9°( ±30 mm), 5.7°(±60 mm), and 7.1°(±75 mm). These values were adjusted for an accuracy within ±0.1°by using a digital clinometer.…”

Section: C2 | Beam Qualitymentioning

confidence: 99%

Assessment of longitudinal beam property and contrast uniformity for 256‐ and 320‐row area detector computed tomography scanners in the 160‐mm nonhelical volume‐acquisition mode

Hara

Niwa

Urikura

et al. 2019

J Applied Clin Med Phys

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Background: Because the x-ray property of patient longitudinal axis in area detector computed tomography (ADCT) depends on a heel effect, radiation dose and beam quality are not uniform along the long axis of the patient. Objective: This study aimed to measure the longitudinal beam properties and contrast uniformity of ADCT scanners in the 160-mm nonhelical volume-acquisition (NVA) mode and provide useful datasets for the radiation dose reduction in ADCT examinations. Materials and Methods: Two different types of ADCT scanners were used in this study. To assess the heel effect in 256-and 320-row ADCT scanners, we measured dose profile, half-value layer, and iodine contrast uniformity along longitudinal beam direction. Results: The maximum effective energy difference within a 160-mm x-ray beam is approximately 4 keV. Maximum radiation dose on the anode side of the x-ray tube showed approximately 40%-45% reduction compared with that on the isocenter position; the heel effect properties longitudinally differed throughout the x-ray beam, and the decrease in the radiation dose in 256-and 320-row ADCT scanners was observed on the patient table side and gantry side respectively. The CT numbers of iodinated solutions for 256-row ADCT scanner were independent of the heel effect; nevertheless, the CT numbers of 320-row ADCT scanner tended to increase on the patient table (cathode) side. Conclusion: This study reveals that the radiation dose on the anode side of the xray tube shows approximately 40%-45% reduction compared with that on the isocenter position, and the heel effect properties for 256-and 320-row ADCT scanners longitudinally differ throughout the x-ray beam. The x-ray tube for individual ADCT scanners is mounted in an opposite direction along the long axis of the patient.

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Image quality and radiation exposure in 320-row temporal bone computed tomography

Cited by 22 publications

References 15 publications

Quantitative and qualitative evaluation of the Wide Volume (WV) versus Helical acquisition on a 320-detector row computed tomography for the exploration of the abdominopelvic region in adults

Quantitative and qualitative evaluation of the Wide Volume (WV) versus Helical acquisition on a 320-detector row computed tomography for the exploration of the abdominopelvic region in adults

Dose reduction in CT imaging for facial bone trauma in adults: A narrative literature review

Assessment of longitudinal beam property and contrast uniformity for 256‐ and 320‐row area detector computed tomography scanners in the 160‐mm nonhelical volume‐acquisition mode

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