Independent review of 4DCT scans used for SABR treatment planning.
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ABSTRACT:
SUBMITTER: Antony R
PROVIDER: S-EPMC7075381 | biostudies-literature | 2020 Mar
REPOSITORIES: biostudies-literature
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Independent review of 4DCT scans used for SABR treatment planning.
Antony Rachitha R Lonski Peta P Ungureanu Elena E Hardcastle Nicholas N Yeo Adam A Siva Shankar S Kron Tomas T
Journal of applied clinical medical physics 20200213 3
Four-dimensional computerized tomography (4DCT) is required for stereotactic ablative body radiotherapy (SABR) of mobile targets to account for tumor motion during treatment planning and delivery. In this study, we report on the impact of an image review quality assurance process performed prior to treatment planning by medical physicists for 4DCT scans used for SABR treatment. Reviews were performed of 211 4DCT scans (193 patients) over a 3-yr period (October 2014 to October 2017). Treatment si ...[more]
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Project description:BackgroundTraditionally, dental models, facial and intra-oral photographs and a set of two-dimensional radiographs are used for orthodontic diagnosis and treatment planning. As evidence is lacking, the discussion is ongoing which specific records are needed for the process of making an orthodontic treatment plan.ObjectiveTo estimate the contribution and importance of different diagnostic records for making an orthodontic diagnosis and treatment plan.Data sourcesAn electronic search in PubMed (1948-July 2012), EMBASE Excerpta Medica (1980-July 2012), CINAHL (1982-July 2012), Web of Science (1945-July 2012), Scopus (1996-July 2012), and Cochrane Library (1993-July 2012) was performed. Additionally, a hand search of the reference lists of included studies was performed to identify potentially eligible studies. There was no language restriction.Study selectionThe patient, intervention, comparator, outcome (pico) question formulated for this study was as follows: for patients who need orthodontic treatment (P), will the use of record set X (I) compared with record set Y (C) change the treatment plan (O)? Only primary publications were included.Data extractionIndependent extraction of data and quality assessment was performed by two observers.ResultsOf the 1041 publications retrieved, 17 met the inclusion criteria. Of these, 4 studies were of high quality. Because of the limited number of high quality studies and the differences in study designs, patient characteristics, and reference standard or index test, a meta-analysis was not possible.ConclusionCephalograms are not routinely needed for orthodontic treatment planning in Class II malocclusions, digital models can be used to replace plaster casts, and cone-beam computed tomography radiographs can be indicated for impacted canines. Based on the findings of this review, the minimum record set required for orthodontic diagnosis and treatment planning could not be defined.Systematic review registration numberCRD42012002365.
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Project description:PurposeTo examine the utility of optical coherence tomography (OCT) for studying eyes with advanced glaucoma [i.e., eyes with a 24-2 visual field (VF) mean deviation (MD) worse than -15 dB], we tested the hypothesis that if these eyes had a 10-2 total deviation (TD) map with points better than -8 dB, then the topographically corresponding regions on the circumpapillary retinal nerve fiber layer (cpRNFL) should show a preserved region.DesignEvaluation of technology study.Participants39 eyes from 33 patients (mean: 68.8 ± 9.2 years) with a diagnosis of glaucoma had a 24-2 VF with a MD ≤ -15 dB (mean: -18.94 ± 2.95 dB). All eyes additionally had a 10-2 VF and an averaged OCT circle scan.MethodsEach scan was inspected, and preserved cpRNFL regions of the disc associated with the macula (central ±8° were delin eated.Main outcome measuresThe number of eyes with preserved cpRNFL regions and their association with preserved VF locations (i.e. better than -8 dB) shown in the 10-2 VF TD map.Results38 of the 39 eyes had one or more points on the 10-2 VF with TD values that were better than -8 dB (mean: 25.7 ± 12.6 points). For all 39 eyes, there was a preserved portion of the cpRNFL on the circle scan within the disc region associated with the macula. However, for 3 of these eyes, this region was hypodense and could be a challenge for the clinician to identify.ConclusionOCT scans can be used to assess and potentially follow the preserved regions of cpRNFL associated with the macula in eyes with advanced glaucoma if there is a preserved region on the 10-2 VF better than -8 dB.
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