Question 259
{"accessible":false,"alternatives":[{"id":1259,"text":"inspiratory AP chest x-ray"},{"id":1260,"text":"expiratory AP chest x-ray"},{"id":1261,"text":"inspiratory PA chest x-ray"},{"id":1262,"text":"expiratory PA chest x-ray"}],"archived":false,"correctAlternativeId":1261,"explanation":"\u003cp\u003eThe cardiothoracic ratio is most accurate to assess for \u003ca href=\"/articles/enlargement-of-the-cardiac-silhouette\"\u003ecardiac silhouette enlargement\u003c/a\u003e on an inspiratory PA projection. Expiratory and AP projections result in overestimation\u0026nbsp;of the cardiothoracic ratio.\u003c/p\u003e","id":259,"imageUrl":null,"imageAttribution":null,"imageAttributionCaseInfo":null,"firstQuestionPath":"/questions/259","nextQuestionPath":null,"relatedArticles":[],"alsoUsedIn":[],"stem":"\u003cp\u003eWhich of the following will provide the most accurate measurement of the cardiothoracic ratio?\u0026nbsp;\u003c/p\u003e","menuLinks":[{"text":"Report problem with question","url":"https://docs.google.com/forms/d/e/1FAIpQLSfO3soWYhOjJ7yErSysyCe5V4A1CqW7WK3rDA7MtAkecMGqNw/viewform?entry.1624461248\u0026entry.553583435=https://radiopaedia.org/questions/259"}],"attemptsPercentages":[{"alternativeId":"1262","percentage":9},{"alternativeId":"1259","percentage":7},{"alternativeId":"1261","percentage":80},{"alternativeId":"1260","percentage":4}],"promptToLogin":false,"questionManager":false,"articleId":"cardiothoracic-ratio"}