Abraham Kim

CT
High rate of pediatric head CT persists despite efforts
U.S. emergency departments continue to rely on CT to routinely evaluate children presenting with head trauma, despite long-standing efforts -- such as the Image Gently initiative -- to reduce overuse of the exam, according to an article published online September 4 in Pediatrics.
September 4, 2018
2017 08 01 16 48 18 312 Child Crying Anxiety 400
CT
5 reasons why CCTA should be a first-line test for CAD
Mounting evidence suggests that coronary CT angiography (CCTA) may be the best first-line test for evaluating possible coronary artery disease (CAD). Physicians from Virginia and Texas detailed five features of CCTA that support this idea in an article published online August 28 in the Journal of Thoracic Imaging.
September 3, 2018
2018 09 04 17 24 0277 Ccta Scan 20180904171459
CT
Lung experts refine diagnostic criteria for IPF on CT
A committee of lung experts from various respiratory societies has prepared a new guideline for diagnosing idiopathic pulmonary fibrosis (IPF) using high-resolution CT scans. The guideline is available in the September issue of the American Journal of Respiratory and Critical Care Medicine.
September 3, 2018
2017 12 20 17 16 6396 Lung General 400
CT
AI spots lung nodules on CT, with low false-positive rate
A group from Alabama has developed a deep-learning artificial intelligence (AI) algorithm capable of detecting lung nodules on CT scans while maintaining a low false-positive rate, according to an article published online August 22 in the Journal of the American Medical Informatics Association.
August 29, 2018
2018 08 29 23 53 1208 Computer Chip 400
Image-Guided Surgery
3D CT navigation technique may improve tumor surgery
Researchers from Canada have developed a new technique that uses real-time imaging of 3D CT models to guide chest wall tumor resection. The method was more accurate and easier to use than conventional thoracoscopy, according to an article recently published online in the Annals of Thoracic Surgery.
August 28, 2018
2018 05 16 22 58 8356 Cancer Cell Target2 400
CT
CCTA biomarker may predict mortality from heart disease
The use of coronary CT angiography (CCTA) to measure fatty tissue around arteries could help predict the risk of mortality from heart disease, according to research published online on 28 August in the Lancet and being presented at the European Society of Cardiology congress in Munich.
August 28, 2018
2018 08 27 23 46 8725 Heart Ekg 400
CT
Radiologist use of CCTA continues its upswing
The utilization rate of coronary CT angiography (CCTA) by radiologists has hit an all-time high since Medicare started covering the test in 2006 -- now surpassing the usage rate of CCTA by cardiologists by 20%, according to an article published online August 26 in the Journal of the American College of Radiology.
August 27, 2018
2016 12 23 14 10 03 523 Graph Bar Arrow Up 400
CT
CT finds heart disease in patients with lung cancer
Assessing coronary artery disease on the CT scans of patients with lung cancer can help clinicians identify which patients require surgery for both the heart and lungs, according to research published online August 16 in the Thoracic and Cardiovascular Surgeon.
August 26, 2018
2017 02 10 15 45 57 410 Heart 400
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SCOT-HEART: CCTA cuts risk of heart attack, death by 41%
Patients with chest pain who underwent coronary CT angiography (CCTA) with standard care had a markedly lower rate of myocardial infarction or death from coronary artery disease than those who only received standard care in a new study, published on August 25 in the New England Journal of Medicine.
August 24, 2018
2016 11 14 15 01 23 950 Heart Scan 400
Radiation Oncology/Therapy
Virtual reality supports patient care, medical education
Virtual reality technology may have a wide range of medical applications that extend beyond gaming and entertainment, say researchers from Pennsylvania. Their proprietary virtual reality program, for example, has helped reduce stress and anxiety for cancer patients awaiting radiation therapy.
August 23, 2018
2018 08 23 20 39 3903 Virtual Reality Scene 400
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SCCT: CCTA identifies underlying heart disease in firefighters
Sudden cardiac death is a leading cause of line-of-duty deaths in firefighters, accounting for 40% of duty-related firefighter deaths in 2023.
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SCCT: AI-driven CAC grading significantly cuts scoring time
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Molecular Imaging
PET/CT scans show lung damage in stone workers
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SCCT: Study explores diagnostic accuracy of CCTA
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LI-RADS ultrasound surveillance version 2024 improves HCC detection
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The 2024 version of the LI-RADS Ultrasound Surveillance system improves detection of hepatocellular carcinoma (HCC) over earlier iterations.
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(A,B) Images from an initial ultrasound examination showed no identifiable lesions and received a consensus ultrasound category of US-1. Nearly the entire liver is visualized, with minimal shadowing (“s”, A and B), and the examination received consensus result of VIS-A. The AFP level was 7.1 ng/mL on assessment six months before the ultrasound, 9.1 ng/mL on assessment three months before examination, and 14.2 ng/mL on assessment on exam day. The AFP result was thus assessed as positive based on a progressive increase on two consecutive tests. The atient was considered to have negative surveillance result according to LI-RADS Ultrasound Surveillance v2017, but positive surveillance result according to LI-RADS Ultrasound Surveillance v2024. (C-D) Axial arterial-phase (C) and portal-venous phase (D) T1-weighted images from subsequent gadoxetic acid-enhanced MRI show a 2-cm arterial-phase hyperenhancing observation (arrow, C) with portal-venous washout (arrow, D) in segment 7. This observation was classified on MRI as LR-5, thus meeting the present study’s reference standard for diagnosis of HCC. The mass is located in the periphery of the liver, an anatomic area where ultrasound visualization can be challenging due to shadowing.
Deep learning helps find, segment lung tumors on CT imaging
By Kate Madden Yee
Using a deep-learning model with lung CT imaging shows promise for identifying and segmenting tumors, researchers have reported.
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EVT promising in patients with extracranial ICA occlusions
By Will Morton
Endovascular thrombectomy (EVT) and best medical treatment are both effective and safe options for patients with acute extracranial internal carotid artery occlusions.
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Images in a 74-year-old male patient who presented at the hospital with acute symptoms of a right hemispheric ischemic stroke and a National Institutes of Health Stroke Scale (NIHSS) score of 24. (A) Nonenhanced CT image shows no signs of early infarction, whereas (B) CT perfusion image shows a large perfusion deficit in the territory of the middle cerebral artery and anterior cerebral artery caused by an extracranial occlusion in the right internal carotid artery. (C) Digital subtraction angiography shows the occlusion in the C1 segment. The extracranial occlusion was passed, reperfused, and subsequently stented (D, E). The final contrast injection did not reveal any intracranial occlusions within the territory of the internal carotid artery (F). At the 24-hour follow-up, there was no infarction on (G) the nonenhanced CT image, and the NIHSS score had decreased to 3 points. Image courtesy of RSNA.
CEUS resolves indeterminate CT, MRI liver observations
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Contrast-enhanced ultrasound (CEUS) can resolve some high-risk indeterminate liver observations initially seen on CT or MRI.
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Images depict a 49-year-old female participant with cryptogenic cirrhosis who presented with a 3.2-cm liver lesion. This biopsy-confirmed hepatocellular carcinoma (HCC) with an initial categorization of Liver Imaging Reporting and Data System (LI-RADS) category LR-4 (probably HCC) at CT was upgraded to LR-5 (definitely HCC) at contrast-enhanced ultrasound (CEUS). (A) Precontrast CT images in the liver show vague hypoattenuation in the medial left hepatic lobe (arrows). (B) Arterial phase images demonstrate no definite arterial phase hyperenhancement (arrows). (C) Washout and an enhancing capsule (arrows) on a late-phase image resulted in an LR-4 categorization. (D) B-mode ultrasound shows a round hypoechoic nodule (arrows). (E) An early-phase CEUS image shows clear arterial-phase hyperenhancement (arrows); (F) No washout at one minute (arrows), and (G) late, mild washout at four minutes (arrows) resulted in a CEUS LR-5 categorization.
PET/CT can rule out CAV in heart transplant patients
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Current topics in mammography
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Surgeon General's alcohol advisory puts patient counseling at the fore
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Patient communication and education may be key for radiologists in the wake of the Surgeon General’s advisory on alcohol-related cancer risk.
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FAPI-PET shows promise for imaging gastric cancers
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CEM has slightly higher mean glandular dose than DBT, mammography
By Amerigo Allegretto
Contrast-enhanced mammography (CEM) has a slightly higher mean glandular dose than other breast imaging modalities.
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Contrast Injector
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