Choo-Won Kim

Publications (2)0.69 Total impact

• Article: Postlobectomy chest radiographic changes: a quantitative analysis.

  Choo-Won Kim, Alla Godelman, Vineet R Jain, Avraham Merav, Linda B Haramati
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  ABSTRACT: To provide a quantitative analysis of postlobectomy chest radiographic changes and to evaluate whether the scarring from prior sternotomy affects the size of the hemithorax and the duration of air leak in patients with subsequent lobectomy. In this retrospective case-controlled series, 10 consecutive patients who had a lobectomy after a prior sternotomy and 30 controls, 3 for each case, matched for lobectomy site were identified. Pre- and postoperative chest radiographs were quantitatively analysed for diaphragmic elevation, size of each hemithorax, mediastinal shift, and the presence of pneumothorax. Charts were reviewed for air-leak duration, surgical complications, and duration of hospitalization. There was no difference between patients with lobectomy and with and without prior sternotomy for the following variables expressed as mean (SD): hemidiaphragm elevation (1.5 ± 2.5 vs 0.5 ± 2.0 cm; P = .2), change of hemithorax size (mean transverse, 0.99 ± 0.05 vs 0.97 ± 0.07; P = .5; craniocaudal, 0.93 ± 0.08 vs 0.91 ± 0.08; P = .4) and mediastinal shift (upper, 1.2 ± 0.4 vs 1.3 ± 0.6; P = .5; lower, 1.2 ± 0.4 vs 1.2 ± 0.3; P = .8), the latter 2 were expressed as the ratio of post- to preoperative measurements. These postlobectomy radiographic findings varied, depending on the resected lobe, and became progressively more pronounced during the first 12 months after surgery. There was no difference in pneumothorax duration (mean [SD]) (9.5 ± 21 days vs 6.4 ± 7.5 days; P = .5), air leak duration (mean [SD]) (0.7 ± 0.8 days vs 1.3 ± 3.9 days; P = .6), complication rate (20% vs 30%; P = .5), or hospital stay (mean [SD]) (6.0 ± 1.7 days vs 6.9 ± 4.7 days; P = .6). There are specific patterns of volume loss, mediastinal shift, and hemidiaphragm displacement that can be quantified on postlobectomy chest radiographs. Prior sternotomy did not affect postlobectomy radiographic changes or patient outcome.
  Canadian Association of Radiologists Journal 09/2011; 62(4):280-7. · 0.69 Impact Factor
• Article: Efficacy of coronary CT angiography: where we are, where we are going, and where we want to be.

  Jeffrey M Levsky, Choo-Won Kim, Daniel M Spevack, Mark I Travin, Jonathan N Tobin, Linda B Haramati
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  ABSTRACT: Over the decade since its earliest introduction, coronary CT angiography has spread rapidly, despite the fact that its validation base is smaller than that of alternative imaging examinations. Consensus statements have issued a call for improvement of coronary CT angiography's knowledge base. This article reviews recent progress in validating the efficacy of coronary CT angiography in the detection of coronary artery disease, with a focus on clinical decision making, management, and outcomes. We discuss the rationale for comparative effectiveness research and a framework for assessment of levels of efficacy. Comparison is made with radionuclide myocardial perfusion imaging, which serves as a model noninvasive examination. The potential roles of coronary CT angiography in screening, early triage, and as a gatekeeper for catheterization are discussed. Although few randomized controlled trials have been performed to date, we review the pivotal publications and mention ongoing and future efforts. Cardiovascular event rates provide the basis for estimating the success of potential study designs. The rigorous validation of coronary CT angiography may serve as a model for other noninvasive diagnostics.
  Journal of cardiovascular computed tomography 3 Suppl 2:S99-108.