{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,30]],"date-time":"2025-10-30T11:30:41Z","timestamp":1761823841220,"version":"3.41.2"},"reference-count":34,"publisher":"Oxford University Press (OUP)","issue":"1070","license":[{"start":{"date-parts":[[2017,1,1]],"date-time":"2017-01-01T00:00:00Z","timestamp":1483228800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/journals\/pages\/open_access\/funder_policies\/chorus\/standard_publication_model"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2017,1,1]]},"abstract":"<jats:sec>\n                  <jats:title>Objective:<\/jats:title>\n                  <jats:p>To evaluate the diagnostic efficacy of single-pass contrast-enhanced multidetector CT (CE-MDCT) performed with a low-radiation high-contrast (LR-HC) dose protocol in selected patients with non-traumatic acute bowel disease.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Methods:<\/jats:title>\n                  <jats:p>65 (32 males, 33 females; aged 20\u201367 years) consecutive patients with non-traumatic acute bowel disease underwent single-pass CE-MDCT performed 70\u2013100\u2009s after i.v. bolus injection of a non-ionic iodinated contrast medium (CM) (370\u2009mgI\u2009ml\u22121). In 46 (70%) patients with a clinical and\/or ultrasonographic suspicion of inflammatory bowel disease, up to 1.2\u20131.4\u2009l of a 7% polyethylene-glycol solution was orally administered 45\u201360 mins prior to the CT examination. Patients were then divided into two groups according to age: Group A (20\u201344 years; n\u2009=\u200934) and Group B (45\u201370 years; n\u2009=\u200931). Noise index (NI) and CM dose were selected as follows: Group A (NI\u2009=\u200915; 2.5\u2009ml\u2009kg\u22121) and Group B (NI\u2009=\u200912.5; 2\u2009ml\u2009kg\u22121). All patients of Group A underwent thyroid functional tests at 4\u20136 weeks. Final diagnoses were obtained by open (n\u2009=\u200912) or laparoscopic surgery (n\u2009=\u20094), endoscopy w\/without biopsy (n\u2009=\u200924) and clinical (n\u2009=\u200919) and\/or instrumental (ultrasonography) (n\u2009=\u20096) follow-up at 11\u2009\u00b1\u20094 months (range 6\u201318\u2009mo.). Statistical analysis was performed by \u03c7 \u00a02 and Student's t-test for categorical and continuous variables, respectively.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Results:<\/jats:title>\n                  <jats:p>Sensitivity and specificity were 91.3 vs 95.4% (p\u2009=\u20090.905) and 90.9 vs 88.8% (p\u2009=\u20090.998) with an overall diagnostic accuracy of 91.1 vs 93.5% (p\u2009=\u20090.756), whereas the radiation (in millisievert) and CM dose (in millilitre) were 7.5\u2009\u00b1\u20092.8\u2009mSv and 155\u2009\u00b1\u200930\u2009ml for Group A and 14.1\u2009\u00b1\u20095.3\u2009mSv and 130\u2009\u00b1\u200924\u2009ml for Group B (p\u2009&amp;lt;\u20090.001), respectively. No patients of Group A showed laboratory signs of thyrotoxicosis at follow-up.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Conclusion:<\/jats:title>\n                  <jats:p>The LR-HC has proved to be a safe and a dose-effective protocol in the evaluation of selected young patients with non-traumatic acute bowel disease.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Advances in knowledge:<\/jats:title>\n                  <jats:p>(1) As reaching the highest diagnostic benefit to risk ratio (AHARA) appears to be the current principle of MDCT imaging, an increased amount of iodinated CM (0.7\u20130.9\u2009gI\u2009ml\u22121) can be safely administered to young patients (&amp;lt;40 years) with normal thyroid and renal function to compensate for the lower image quality resulting from low-dose CT protocols performed with the standard filter back-projection algorithm. Such an approach will result in a significant reduction of the radiation dose, which could be otherwise achieved only using iterative reconstruction algorithms combined with either low tube voltage and\/or low tube current protocols. (2) An optimal scan delay (T \u00a0delay) for a venous phase caudocranial acquisition can be calculated by the following formula: T \u00a0delay\u2009=\u2009CI\u2009+\u200925\u2009\u2212\u2009T \u00a0SD, where CI is the duration of the contrast injection, 25 is the average of the sum of abdominal aortic and peak hepatic arrival times and T \u00a0SD is the scan duration. With such an approach, the radiation exposure resulting from bolus tracking, albeit performed with low-dose scans, can be spared in patients with normal transit times.<\/jats:p>\n               <\/jats:sec>","DOI":"10.1259\/bjr.20160612","type":"journal-article","created":{"date-parts":[[2016,11,9]],"date-time":"2016-11-09T11:48:29Z","timestamp":1478692109000},"source":"Crossref","is-referenced-by-count":9,"title":["Diagnostic efficacy of single-pass abdominal multidetector-row CT: prospective evaluation of a low dose protocol"],"prefix":"10.1093","volume":"90","author":[{"given":"Luigi","family":"Camera","sequence":"first","affiliation":[{"name":"Section of Diagnostic Imaging, Department of Advanced Biomedical Sciences, University \u201cFederico II\u201d, Naples, Italy"},{"name":"National Research Council (CNR), Institute of Biostructures and Bioimaging, Naples, 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