Per patient, a predefined set of 20 anatomical measurements was obtained by each observer ( Fig. 2). The Osirix Lite® DICOM viewer was operated by a researcher and a vascular surgeon. Four vascular surgeons used dedicated commercial image processing software for EVAR sizing as provided by their medical center of residence (three for 3Mensio Vascular ® and one for Siemens Syngo.via®).

“ROIs” folder stores ROIs of DICOM images.For each patient, 5 vascular surgeons from 4 medical centers and one researcher after extensive sizing training performed EVAR planning on the preoperative CTA images.

This folder is deleted when you exit OsiriX.

“TEMP” folder contains files during conversion time.

“INCOMING” folder contains temporarily files that are received by the listener.

“DATABASE” folder contains ‘local’ DICOM files.

You can modify the database management in the Preferences window. This function will re-scan all files displayed in the “Local Database” window, remove all unavailable files and add all files available in the “DATABASE” folder (received from the PACS network). Simply select Rebuild Database from the File menu. This will delete the “DATA.DAT” file and reconstruct a new one. You can also rebuild the database at any time. It does not contain any important data, only links to DICOM files. This file is located in the “OsiriX Data” folder. OsiriX keeps information of all images in the “DATA.DAT” file.

This means that if you delete them from the “Local Database” window, OsiriX will either delete the links to files or delete files located in the “DATABASE” folder.

If you import your files with the “Import” button or menu item, OsiriX can either keep a link to these files or copy them in the “DATABASE” folder.This means that if you delete them from the “Local Database” window, Osirix will definitively delete these files. If you receive your images with the DICOM listener, they are stored in the “DATABASE” folder in the “OsiriX Data” folder, located in your “Documents” folder.Two things are important to understand about your local database:

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