Question 2545
{"accessible":true,"alternatives":[{"id":12485,"text":"descending aorta"},{"id":12486,"text":"left atrial appendage"},{"id":12487,"text":"left main bronchus"},{"id":12488,"text":"left pulmonary artery"},{"id":12489,"text":"pulmonary trunk"}],"archived":false,"correctAlternativeId":12489,"explanation":"\u003cp\u003eThe outline of the pulmonary trunk (main pulmonary artery) is the arrowed structure. It forms an important part of the \u003ca href=\"/articles/normal-contours-of-the-cardiomediastinum-on-chest-radiography\" title=\"Normal cardiomediastinal outline\"\u003enormal cardiomediastinal outline\u003c/a\u003e.\u003c/p\u003e","id":2545,"imageUrl":"https://prod-images-static.radiopaedia.org/multiple_choice_questions/498/quiz.001_big_gallery.jpeg","imageAttribution":{"kind":"case","rID":8090},"imageAttributionCaseInfo":{"title":"Normal frontal chest x-ray","contributor_name":"Frank Gaillard","contributor_param":"frank","case_rid":8090,"case_param":"normal-frontal-chest-x-ray"},"firstQuestionPath":"/questions/2567","nextQuestionPath":null,"relatedArticles":[{"id":17825,"title":"Descending aorta","link":"/articles/descending-aorta?lang=us"},{"id":8469,"title":"Normal contours of the cardiomediastinum on chest radiography","link":"/articles/normal-contours-of-the-cardiomediastinum-on-chest-radiography?lang=us"},{"id":48183,"title":"Left atrial appendage","link":"/articles/left-atrial-appendage?lang=us"},{"id":45879,"title":"Left main bronchus","link":"/articles/left-main-bronchus?lang=us"}],"alsoUsedIn":[{"id":1411,"kind":"Course","title":"Emergency Radiology Course - page 1411","link":"https://radiopaedia.org/courses/emergency-radiology-course-online/pages/1411"},{"id":1411,"kind":"Course","title":"Emergency Radiology Course - Melbourne - page 1411","link":"https://radiopaedia.org/courses/emergency-radiology-course-melbourne-2022/pages/1411"},{"id":1411,"kind":"Course","title":"Emergency Radiology Course - Brisbane - page 1411","link":"https://radiopaedia.org/courses/emergency-radiology-course-brisbane-2022/pages/1411"}],"stem":"\u003cp\u003eChest radiograph of a young adult. The outline of what normal structure is indicated by the arrows? \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/2545"}],"attemptsPercentages":[{"alternativeId":"12489","percentage":45},{"alternativeId":"12486","percentage":16},{"alternativeId":"12487","percentage":1},{"alternativeId":"12485","percentage":6},{"alternativeId":"12488","percentage":33}],"promptToLogin":false,"questionManager":false,"articleId":"pulmonary-trunk"}