2022
DOI: 10.1097/rli.0000000000000898
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Low-Dose CT Imaging of the Pelvis in Follow-up Examinations—Significant Dose Reduction and Impact of Tin Filtration

Abstract: Objectives: Low-dose (LD) computed tomography (CT) is still rarely used in musculoskeletal (MSK) radiology. This study evaluates the potentials of LD CT for follow-up pelvic imaging with special focus on tin filtration (Sn) technology for normal and obese patients with and without metal implants. Materials and Methods: In a phantom study, 5 different LD and normal-dose (ND) CT protocols with and without tin filtration were tested using a normal and an obese phantom. Iterative reconstruction (IR) and filtered b… Show more

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Cited by 6 publications
(4 citation statements)
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“…The use of spectral shaping leads to a homogenized, hardened radiation which has an intrinsically lower image noise than non-tin filter examinations, which benefits the image quality. This has been confirmed in several studies [19,32,40,41]. At the same time, however, the absence of the softer radiation components leads to a loss of contrast, with a corresponding loss of CNR [20,32,40,41].…”
Section: Plos Onesupporting
confidence: 56%
See 2 more Smart Citations
“…The use of spectral shaping leads to a homogenized, hardened radiation which has an intrinsically lower image noise than non-tin filter examinations, which benefits the image quality. This has been confirmed in several studies [19,32,40,41]. At the same time, however, the absence of the softer radiation components leads to a loss of contrast, with a corresponding loss of CNR [20,32,40,41].…”
Section: Plos Onesupporting
confidence: 56%
“…This has been confirmed in several studies [19,32,40,41]. At the same time, however, the absence of the softer radiation components leads to a loss of contrast, with a corresponding loss of CNR [20,32,40,41]. This decrease in contrast is usually not important in high-contrast examinations such as imaging bone or lung structures.…”
Section: Plos Onementioning
confidence: 67%
See 1 more Smart Citation
“…The tin filter has been shown to reduce radiation doses substantially for standalone CT examinations performed without contrast enhancement, for imaging of bone [ 7 9 ], lung nodules [ 10 , 11 ], abdominal imaging [ 12 ] and coronary calcium scoring [ 13 , 14 ], amongst others. The tin filter could potentially allow large dose reductions for ULDCT scans for PET AC compared with the standard ULDCT protocol, and for localisation/characterisation level scans performed in PET-CT, but the effect of the tin filter on PET quantification should be ascertained, since the tin filter increases average beam energy, thereby impacting CT HUs.…”
Section: Introductionmentioning
confidence: 99%