Detection of pulmonary nodules: a clinical study protocol to compare ultra-low dose chest CT and standard low-dose CT using ASIR-V
| Autor: | Julien G. Cohen, Anthony Cole, Marie Ludwig, Gilbert Ferretti, E. Chipon, Maud Medici, Alexandre Moreau Gaudry, E. Reymond |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Adult
Male medicine.medical_specialty iterative reconstruction Lung Neoplasms Ultra low dose Concordance Chest ct Radiation Dosage ultra low dose computed tomography 030218 nuclear medicine & medical imaging 03 medical and health sciences 0302 clinical medicine lung cancer screening medicine Protocol Low dose ct Humans Early Detection of Cancer Protocol (science) Lung business.industry Radiology and Imaging Reproducibility of Results Nodule (medicine) pulmonary nodule General Medicine Middle Aged medicine.anatomical_structure 030220 oncology & carcinogenesis Multiple Pulmonary Nodules Female Radiology medicine.symptom business Tomography X-Ray Computed Lung cancer screening Algorithms low dose computed tomography |
| Zdroj: | BMJ Open |
| ISSN: | 2044-6055 |
| Popis: | IntroductionLung cancer screening in individuals at risk has been recommended by various scientific institutions. One of the main concerns for CT screening is repeated radiation exposure, with the risk of inducing malignancies in healthy individuals. Therefore, lowering the radiation dose is one of the main objectives for radiologists. The aim of this study is to demonstrate that an ultra-low dose (ULD) chest CT protocol, using recently introduced hybrid iterative reconstruction (ASiR-V, GE medical Healthcare, Milwaukee, Wisconsin, USA), is as performant as a standard ‘low dose’ (LD) CT to detect non-calcified lung nodules ≥4 mm.Methods and analysisThe total number of patients to include is 150. Those are referred for non-enhanced chest CT for detection or follow-up of lung nodule and will undergo an additional unenhanced ULD CT acquisition, the dose of which is on average 10 times lower than the conventional LD acquisition. Total dose of the entire exam (LD+ULD) is lower than the French diagnostic reference level for a chest CT (6.65 millisievert). ULD CT images will be reconstructed with 50% and 100% ASiR-V and LD CT with 50%. The three sets of images will be read in random order by two pair of radiologists, in a blind test, where patient identification and study outcomes are concealed. Detection rate (sensitivity) is the primary outcome. Secondary outcomes will include concordance of nodule characteristics; interobserver reproducibility; influence of subjects’ characteristics, nodule location and nodule size; and concordance of emphysema, coronary calcifications evaluated by visual scoring and bronchial alterations between LD and ULD CT. In case of discordance, a third radiologist will arbitrate.Ethics and disseminationThe study was approved by the relevant ethical committee. Each study participant will sign an informed consent form.Trial registration numberNCT03305978; Pre-results. |
| Databáze: | OpenAIRE |
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