Radiology & Imaging

May 232011

Zanobetti et al prospectively evaluated 404 consecutive people presenting to one emergency room for dyspnea with point-of-care ultrasonography (all done by one MD) followed by chest radiograph. In the 118 instances when the tests provided discordant diagnoses, chest CT was obtained and was used as the gold standard. Concordance between US and CXR was high across all [… read more]

May 062011

Rich et al from U. of Chicago add to the “we said, they said” record on echocardiography’s accuracy in measuring PA pressures (and by implication, whether it can be used to justify oral therapy for PAH without invasive testing). They measured 160 people’s PAP by right heart catheterization and ECHO, both tests within one month; they then [… read more]

Apr 292011

COPD’s systemic inflammatory effects are postulated to negatively impact bone turnover. After looking at CT scans, PFTs, and steroid history in 190 current and former smokers, Bon et al found visual emphysema on chest CT was highly correlated with osteopenia/osteoporosis, with an odds ratio of 2.55 that was independent of airflow limitation, age, sex, inhaled/oral [… read more]

Apr 262011

Pulmonary hypertension is often “diagnosed” with a tricuspid regurgitant jet velocity > 2.5 m/s on echocardiogram. Bossone et al found that 76 of 615 (12%) trained athletes (strength or endurance) exceeded this number, and suggest the upper limit of normal should be 40 mm Hg in endurance athletes. CHEST 2011;139:788-794.

Apr 112011

Establishing mediastinal spread of non-small cell lung cancer (N2-3 disease) precludes surgery and worsens prognosis; whether PET-CT imaging can improve overall accuracy or safely prevent mediastinoscopies is still unknown. Fischer et al re-heat the data from their 2009 NEJM randomized trial in Denmark, with EUS-FNA and mediastinoscopy on 189 NSCLC patients, in which they concluded that the [… read more]

Apr 102011

Ashraf et al selected people with lung nodules from the Danish Lung Cancer Screening Trial, referring them for PET. Having a suspicious PET scan, or a volume-doubling time (VDT) of < 1 year, each separately had a sensitivity of 71% and a specificity of 91% for lung cancer. Combining PET data with VDT improved sensitivity [… read more]

Feb 202011

Aduen et al performed simultaneous echocardiograms and right heart catheterizations on 117 patients, concluding echo is more accurate and precise than others previously found. They also promote a method of calculating and reporting mean PA pressure on echo, rather than systolic PA pressure. Right heart catheterization remains indispensable as the gold standard. CHEST 2011;139:347-352

Jun 162000

Ultrasound in the ICU: Case 1 Discussion Go Back to Ultrasound Case 1 Ultrasound Case 1 Answer: Hypovolemia. Hypotension may be caused by diverse pathophysiologic states that are hard to differentiate by clinical exam. Bedside ultrasound can provide immediate visual information that can help to rapidly make diagnoses of life-threatening conditions, without dependence on radiology [… read more]