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Residents' ability to interpret radiology images: development and improvement of an assessment tool.

Abstract：

RATIONALE AND OBJECTIVES:Despite increasing radiology coverage, nonradiology residents continue to preliminarily interpret basic radiologic studies independently, yet their ability to do so accurately is not routinely assessed. MATERIALS AND METHODS:An online test of basic radiologic image interpretation was developed through an iterative process. Educational objectives were established, then questions and images were gathered to create an assessment. The test was administered online to first-year interns (postgraduate year [PGY] 1) from 14 different specialties, as well as a sample of third- and fourth-year radiology residents (PGY3/R2 and PGY4/R3). RESULTS:Over a 2-year period, 368 residents were assessed, including PGY1 (n = 349), PGY3/R2 (n = 14), and PGY4/R3 (n = 5) residents. Overall, the test discriminated effectively between interns (average score = 66%) and advanced residents (R2 = 86%, R3 = 89%; P < .05). Item analysis indicated discrimination indices ranging from -0.72 to 48.3 (mean = 3.12, median 0.58) for individual questions, including four questions with negative discrimination indices. After removal of the negatively indexed questions, the overall predictive value of the instrument persisted and discrimination indices increased for all but one of the remaining questions (range 0.027-70.8, mean 5.76, median 0.94). CONCLUSIONS:Validation of an initial iteration of an assessment of basic image-interpretation skills led to revisions that improved the test. The results offer a specific test of radiologic reading skills with validation evidence for residents. More generally, results demonstrate a principled approach to test development.

journal_name

Acad Radiol

journal_title

Academic radiology

authors

Seagull FJ,Bailey JE,Trout A,Cohan RH,Lypson ML

doi

10.1016/j.acra.2014.03.010

subject

Has Abstract

pub_date

2014-07-01 00:00:00

pages

909-15

issue

7

eissn

1076-6332

issn

1878-4046

pii

S1076-6332(14)00126-3

journal_volume

21

pub_type

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