Was bedeutet mGy?
Das Dosis-Längen-Produkt (DLP) ist eine Maßeinheit in der Dosimetrie und beschreibt die Strahlenbelastung durch eine Röntgenaufnahme mit Hilfe eines Computertomographen. Die Einheit des DLP ist das mGy*cm (Milli-Gray* Zentimeter). Der Index (w bzw. Luft) gibt an, ob das DLP in Luft oder in Wasser bestimmt wurde.
Wie lange gibt es CT?
Nach einer Reihe von Tieruntersuchungen zum Beleg der Unbedenklichkeit wurde die erste CT-Aufnahme an einem Menschen im Jahr 1971 aufgenommen. Schon 1972 wurde der erste kommerzielle Computertomograph, der EMI Mark 1, für die klinische Anwendung im Londoner Atkinson Morley Hospital installiert.
What is the difference between ctctdi and DLP?
CTDI and DLP. In CT, the total amount of radiation incident on the patient, known as the DLP, is the product of the CTDI vol and scan length (in centimeters) and is measured in milligray-centimeters. The DLP is the second dose metric that is easily accessible to the radiologist and accounts for both radiation intensity (ie,…
Can we use CTDI Vol and DLP to measure radiation dose?
In this case, the answer is a resounding yes. CTDI vol, DLP, and effective dose are excellent measures of radiation dose from CT and could be used immediately to improve the safety of CT by identifying when doses may be higher than necessary and standardizing how we conduct CT examinations. Disclosures of Potential Conflicts of Interest: R.S.B.
What is the difference between ctidvol and DLP?
CTDIvol represents the output when scanning a phantom, while DLP takes into account the scan length. We’ve seen instances where CTIDvol is considered well within a “normal” range but DLP was unexpectedly high. We found the scan settings were appropriate for the study, but the exam length was longer than what others were using.
How do you calculate DLP on a CT scan?
This estimate comes from data obtained from a CT phantom (click here to learn about phantoms). DLP is calculated by multiplying the CTDIvol by the length of the patient scanned in cm (mGy*cm). If the patient undergoes more than one scan during the course of a study, the DLPs are simply added together.