Radiology & Imaging Articles

Mar 072012
 

When someone with a pneumothorax lies supine — as in the 23-year old man described in this New England Journal mini-case from Saweera Sabbar and Eric James Nilles of Rashid Trauma Center in Dubai, UAE — air rises laterally and caudally, and creates displacement downward and medially of the hemidiaphragm, displaying as the “deep sulcus [… read more]

Feb 032012
 

Jean-Pierre Tourtier and Sophie Cottez of the Military Hospital Val-de-Grâce, Paris share the case of a 61-year-old man who underwent vertebroplasty after a therapeutic laminectomy for resection of a vertebral hemangioma. Cement made it into his paravertebral vascular system, and thence to his systemic circulation and pulmonary arteries, where it made for some interesting radiographic pictures. [… read more]

Jan 282012
 

Hayder Saeed and Suleiman Massarweh of the University of Kentucky share with us the story and images of a woman presenting with weight loss and cough, and discovered to have hypertrophic pulmonary osteoarthropathy, velvety palmar skin, clubbing … and an 11 cm adenocarcinoma in the right lung. Saeed H, Massarweh S. Hypertrophic Pulmonary Osteoarthropathy and [… read more]

Jan 202012
 

Richard Light and friends established that parapneumonic effusions (PPE) associated with community-acquired pneumonia very rarely progress if the effusion is freely layering and less than 1 cm in height on a lateral decubitus chest film. But who orders those anymore? Chest CT use has risen 20-fold since Light’s seminal 1980 paper. Often the CT has [… read more]

Jan 192012
 

A 40-year old asthmatic woman coughed the corner of her right lower lobe right through her chest wall, needing a thoracotomy to repair it. She seemed to have recovered well at 3-month follow-up. Matthew O’Shea and Morgan Cleasby of Good Hope Hospital in Birmingham (United Kingdom) share their fascinating pictures in a New England Journal show-and-tell. [… read more]

Jan 012012
 

The National Lung Screening Trial demonstrated annual screening with chest CT saves one life per 320 screened compared to yearly screening with chest radiography. However, there was no “usual care” group (no screening at all) to compare against. Oken et al report additional results from the PLCO Trial (Prostate, Lung, Colorectal, and Ovarian Cancer Screening [… read more]

Jan 012012
 

Ultrasound is the future. It’s even better than that: it’s the present. So say proponents Seth Koenig, Mangala Narasimhan and pioneer & innovator Paul Mayo in this month’s CHEST review. They endorse a “paradigm shift” meaning, in effect, you get professionally trained on this highly versatile, effective, and immediate-results-providing modality and integrate it into your routine [… read more]

Dec 262011
 

Results of the National Lung Screening Trial (NLST) are in! Enrollment was 8/2002 to 4/2004. Follow-up was through end of 2009. Patients were age 55-74, with >30 pack-year smoking history, still smoking or quit <15 years. Intervention / Control: Low-dose chest CT vs. chest plain films thrice-yearly. By screening these 53,454 high-risk people, 62 deaths [… read more]

Dec 262011
 

Using the Nationwide Inpatient Sample and the national Multiple Cause-of-Death files, Wiener et al found that since the inception of CT-angiography in 1998, the number of CT-PE scans have risen 11-fold, and age-adjusted incidence of pulmonary embolism rose from 62 to 112 per 100,000 (an 81% increase). Over the same period, the mortality rate (presence of PE [… read more]

Dec 182011
 

Dalteparin is a low-molecular weight heparin that, unlike enoxaparin, is safe for people with renal failure. Among 3,746 ICU patients in 6 countries, followed until hospital discharge, there was no difference in the rate of proximal deep venous thrombosis (5.1% vs 5.8%, 1′ endpoint) between once-daily dalteparin and twice-daily UFH, as detected by twice-weekly ultrasounds. [… read more]

Nov 162011
 

Chronic thromboembolic pulmonary hypertension is a “new” condition (in terms of our recognition and understanding of it), whose true prevalence, natural history, and response to therapies continue to be elucidated. Meanwhile, specialized surgical centers continually make thromboendarterectomy safer, providing definitive cures that are nothing short of miraculous for those affected by this otherwise usually fatal [… read more]

Nov 022011
 

A nice pro/con soundoff between Gerard Silvestri (con) and James Jett & David Midthun (pro) over whether lung cancer screening with chest CT should be national policy, in the wake of the positive findings of the National Lung Screening Trial. Silvestri (of MUSC) argues that we don’t have a handle on the harms of screening [… read more]

Nov 012011
 

More than 40 small, middling-quality studies (n~80, some randomized) showing inconsistent results as to whether antioxidant therapy with acetylcysteine or other drugs reduces the risk for contrast nephropathy / acute kidney injury after angiography or CT-angiography. A 2008 meta-analysis concluded Mucomyst was helpful, reducing risk of nephropathy by almost 40% vs saline alone. However, the authors noted [… read more]

Oct 302011
 

Lucassen et al sharpened their pencils and tried to combine in a meta-analysis 52 studies (n=55,268) that examined the success of methods of using “gestalt” (subjective impression) or clinical decision rules (Wells, Geneva or revised Geneva scores) to diagnose acute pulmonary embolism. The punchline (and their unstated but implied conclusion) is, we just can’t safely [… read more]

Oct 302011
 

How many licks does it take to get to the middle of a Tootsie Roll Pop? How many angels can dance on the head of a pin? And that other timeless mystery: How many airways do patients with COPD have, how narrowed are they, and what is the relationship between said narrowing, coexisting emphysematous destruction, [… read more]

Oct 292011
 

While we were screening our heavy smokers for lung cancer with chest CTs, the Dutch and Belgians have been screening their own (in the NELSON trial, which will report results in 2015). They double-dipped their imaging data here to ask the question, how good is chest CT at identifying undiagnosed chronic obstructive pulmonary disease? 1,140 [… read more]

Oct 272011
 

Resection of isolated pulmonary metastasis resulted in surprising longevity in this study by Hornbech et al. They report a series of 248 patients, 97% of whom had a complete resection of their pulmonary metastasis, following them for an average of 5 years. The five year survival rates after pulmonary metastasectomy were as follows: Colorectal cancer: [… read more]

Oct 072011
 

Zhang et al pooled 20 studies that compared ultrasound, chest X-ray, or both against a reference standard (usually CT scan) for the diagnosis of pneumothorax. Chest X-ray had a pooled sensitivity of 52% and specificity 99% for diagnosis of pneumothorax. Ultrasound’s pooled sensitivity was 88% and specificity, 100%. Unsurprisingly, the accuracy of ultrasonography to diagnose [… read more]