Publications by authors named "Yousef W Nielsen"

Purpose: The causes of burst abdomen after midline laparotomy remain uncertain. Obesity is a suspected risk factor. The purpose of this study was to investigate the association between abdominal subcutaneous obesity (ASO) and burst abdomen in patients undergoing emergency midline laparotomy.

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Purpose: Burst abdomen is a serious complication commonly observed after emergency midline laparotomy. Sarcopenia has been associated with increased morbidity and mortality after abdominal surgery. This single-center, retrospective, matched case-control study aimed to investigate the association between sarcopenia and burst abdomen in patients undergoing emergency midline laparotomy.

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Purpose: The primary aim was to investigate the diagnostic performance of an Artificial Intelligence (AI) algorithm for pneumoperitoneum detection in patients with acute abdominal pain who underwent an abdominal CT scan.

Method: This retrospective diagnostic test accuracy study used a consecutive patient cohort from the Acute High-risk Abdominal patient population at Herlev and Gentofte Hospital, Denmark between January 1, 2019 and September 25, 2019. As reference standard, all studies were rated for pneumoperitoneum (subgroups: none, small, medium, and large amounts) by a gastrointestinal radiology consultant.

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Article Synopsis
  • - The review examines 100 years of research on contrast media (CM) since 1921, focusing on iodine- and gadolinium-based CMs along with manganese and barium for specific imaging uses.
  • - It discusses the historical context of specialized CMs for cholegraphy and myelography, which have become outdated due to advancements in imaging technologies like CT scans, MRI, and ultrasound.
  • - The review also covers the use of radioactive thorium-based CM for angiography and highlights publications regarding adverse reactions related to contrast media.
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Objective: The primary objective of this trial was to compare the parastomal hernia rates 1 year after the construction of an end colostomy by 3 surgical techniques: cruciate incision, circular incision in the fascia and using prophylactic mesh. Secondary objectives were evaluation of postoperative complications, readmissions/reoperations, and risk factors for parastomal hernia.

Summary Of Background Data: Colostomy construction techniques have been explored with the aim to improve function and reduce stoma complications, but parastomal herniation is frequent with an incidence of approximately 50%.

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In the last decade contrast-enhanced magnetic resonance angiography (CE-MRA) has gained wide acceptance as a valuable tool in the diagnostic work-up of patients with peripheral arterial disease. This review presents current concepts in peripheral CE-MRA with emphasis on MRI technique and contrast agents. Peripheral CE-MRA is defined as an MR angiogram of the arteries from the aortic bifurcation to the feet.

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Purpose: The purpose of the study was to evaluate unenhanced Magnetic Resonance Imaging (MRI) for the diagnosis of appendicitis or another surgery-requiring condition in an adult population scheduled for emergency appendectomy based on a clinical diagnosis of suspected acute appendicitis.

Materials And Methods: The prospective study included 48 consecutive patients (29 female, 19 male, 18-70 years old, mean age=37.1 years).

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Background: Whole-body magnetic resonance angiography (WB-MRA) is a noninvasive method for diagnosing the systemic distribution of atherosclerosis. Numerous studies have demonstrated the feasibility and diagnostic performance of WB-MRA, but no studies have investigated patient acceptance of this imaging method.

Purpose: To measure patient acceptance of WB-MRA compared to the gold standard, digital subtraction angiography (DSA), in patients with peripheral arterial disease (PAD).

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The purpose of this investigation was to determine if addition of infragenicular steady-state (SS) magnetic resonance angiography (MRA) to first-pass imaging improves diagnostic performance compared with first-pass imaging alone in patients with peripheral arterial disease (PAD) undergoing whole-body (WB) MRA. Twenty consecutive patients with PAD referred to digital-subtraction angiography (DSA) underwent WB-MRA. Using a bolus-chase technique, first-pass WB-MRA was performed from the supra-aortic vessels to the ankles.

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Rationale And Objectives: Whole-body magnetic resonance angiography (WB-MRA) at 3 T with body coil acquisition has not previously been investigated. In this study, WB-MRA was performed in this manner using the blood pool contrast agent gadofosveset trisodium.

Materials And Methods: Eleven consecutive patients (five men, six women) with symptomatic peripheral arterial disease (two with critical limb ischemia, nine with claudication) were examined.

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The purpose of this study was to determine the diagnostic performance of 3T whole-body magnetic resonance angiography (WB-MRA) using a hybrid protocol in comparison with a standard protocol in patients with peripheral arterial disease (PAD). In 26 consecutive patients with PAD two different protocols were used for WB-MRA: a standard sequential protocol (n = 13) and a hybrid protocol (n = 13). WB-MRA was performed using a gradient echo sequence, body coil for signal reception, and gadoterate meglumine as contrast agent (0.

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Whole-body magnetic resonance angiography (WB-MRA) is a new approach for diagnosing atherosclerosis. Through utilisation of fast whole-body MRI systems, the arterial system, excluding the intracranial and coronary arteries, can be investigated in one examination. WB-MRA has the potential of replacing conventional catheter-based angiography in the diagnostic workup of patients with atherosclerotic disease.

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