The persistent hypoglossal artery is a rare perseverance of an embryonic vessel connecting the anterior and posterior circulations and is generally considered to be an incidental finding. This is a case of a patient with an atherosclerotic narrowing at the origin of the persistent hypoglossal artery seen at 3D CT angiography. The pertinent findings and clinical implications of this anomalous ve...

A 57-year-old man presented with persistent hyperparathyroidism following primary parathyroidectomy. A four-dimensional computed tomography scan with three-dimensional reconstruction showed two parathyroid glands (one right and one left) and anatomic variation from previous surgery. Revision surgery was performed revealing the parathyroid glands as expected from the preoperative three-dimension...

Abstract   Case Description- A three-day-old male Kordi lamb had a soft painless fluctuating mass on the mid-parietal region, with no clinical signs except difficulty in standing; was referred to the clinic. Clinical Findings- Clinical examination revealed a normal body temperature, a heart rate, a respiratory rate, and inability to stand without any congenital defects Three-dimensional comp...

brachial artery aneurysms are rare but potentially limb threatening condition. the presented case here is a 52-year old male referred to the emergency department complaining a sudden onset and progressive pain with coldness of his right upper extremity during brushing. the right upper extremity was pulseless and three-dimensional computed tomography showed an aneurysm of the proximal right brac...

Respiratory motion degrades anatomic position reproducibility and leads to issues affecting image acquisition, treatment planning, and radiation delivery. Four-dimensional (4D) computer tomography (CT) image acquisition can be used to measure the impact of organ motion and to explicitly account for respiratory motion during treatment planning and radiation delivery. Modern CT scanners can only ...

In a meta-analysis by Ollier et al 1 on chest CT scan screening for lung cancer in asbestos-exposed workers in a recent issue of CHEST (June 2014), one source of heterogeneity was omitted: CT scan procedures. Among the seven studies included in the meta-analysis, slice thickness obtained with CT scans was heterogeneous. Not all CT scan procedures in the seven studies used thin slices. Most repo...

We studied the value of CT scans for all children referred because of headache to one secondary and one tertiary pediatric centre during a 1 year period. Of 117 children who were seen by the Pediatric Neurology Service, at the I.W.K. Children's Hospital, 4 had CT scans and only 1 of these was abnormal. The consultant Pediatrician saw 40 children because of headache. CT scans were done on 3 of t...

Learning objectives • To evaluate indications for PET-CT in plasma cell dyscrasias and its added value over other imaging modalities with review of literature based evidence and reference to the RCR/RCP guidelines. • To discuss the use of PET-CT and subsequent clinical impact at our institution with pictorial illustration. • To discuss the limitations and potential pitfalls of PET-CT with picto...

Objectives. Incidental findings on computed tomography (CT) scans are common. We sought to examine rates of findings and disclosure among discharged patients who received a CT scan in the ED. Methods. Retrospective chart review (Aug-Oct 2009) of 600 patients age 18 and older discharged home from an urban Level 1 trauma center. CT reports were used to identify incidental findings and discharge p...

OBJECTIVE Since its introduction early in the 1990s, helical CT has become the predominant technology for obtaining CT images for medical applications. Recent improvements in the temporal resolution of helical CT (subsecond) and the addition of retrospective cardiac gating are combined in this report evaluating cardiac-gated helical CT for quantifying coronary artery calcium. We compare total c...