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Materials for Existing Clients - FAQs

Administrative/Contact Questions

Question: Should the CD-ROMs or floppy disks be given to the person in charge or study coordinator at each site for shipment to Tufts?
Answer: The logistics of who sends the images to Tufts should be established at each site.

Question: If the technologist changes throughout the study, should Tufts be notified?
Answer: Yes, a new equipment checklist must be sent to inform Tufts of a change in a technologist or coordinator to ensure that all communications are sent to the correct contact personnel.

Question: If there are two technologists performing the study at a site, should both be included on the equipment checklist?
Answer: Yes, this is preferred. If there are multiple technicians performing the study at a site, then all should be included on the equipment checklist. However, the supervisor is the preferred contact.

Scanning Performance Questions

Question: Can the sites interpret the scans locally if required by the IRB?
Answer: If IRBs require local interpretation of the scans, it is acceptable. However, the analysis should only be kept for the site records. Tufts prefers to receive raw data, therefore, local analysis should be performed after the scans have already been copied to the CD-ROMs or floppy disk.

Question: If the subject is too tall, should the feel or head be excluded?
Answer: Tufts prefers that the feet be excluded first. However, if this is not possible, for some reason, and the head is excluded, all follow-up scans should be performed in a consistent manner.

Question: Which hip should be scanned?
Answer: Always scan the left hip unless there has been a breakage or surgical implant, in which case the right hip may be scanned. Again, all follow-up scans should be performed in a consistent manner.

Question: Is there a specific way to determine if the array mode or fast array mode should be used for subject scans? How does this apply to large subjects?
Answer: Whole body scans should be performed using the array mode by default, regardless of size. The hip and spine scans can be performed in either the array or fast array mode- both are acceptable. Please note that a high definition scan mode must not be used on any subjects. Also, the same scan mode used at baseline should be used at each subsequent time point.

Question: If a new DXA machine is purchased at a site during the study period, should Tufts be notified?
Answer: YES, please send Tufts the new machine specifications immediately on a new DXA Equipment Checklist. Patients who have received baseline scans on the older machine should also receive follow-up scans on the same machine. For new patients, the new machine is acceptable for all scans.

Question: If a DXA machine is updated or repaired with changes throughout the study, should Tufts be notified?
Answer: Yes, please inform Tufts of any machine maintenance or repair operations.