Journal article
Operator radiation doses during CT-guided spine procedures.
- Pravatà E Department of Neuroradiology, Neurocenter of Southern Switzerland, Ospedale Regionale di Lugano, Via Tesserete, 46, 6900, Lugano, Switzerland. Electronic address: emanuele.pravata@eoc.ch.
- Presilla S Medical Physics Unit, Ospedale Regionale di Bellinzona e Valli, Bellinzona, Switzerland. Electronic address: Stefano.presilla@eoc.ch.
- Roccatagliata L Department of Neuroradiology, Ospedale San Martino, Genoa, Italy. Electronic address: lroccatagliata@neurologia.unige.it.
- Cianfoni A Department of Neuroradiology, Neurocenter of Southern Switzerland, Ospedale Regionale di Lugano, Via Tesserete, 46, 6900, Lugano, Switzerland; Department of Neuroradiology, Inselspital of Bern, Switzerland. Electronic address: alessandro.cianfoni@eoc.ch.
- 2018-08-15
Published in:
- Clinical neurology and neurosurgery. - 2018
CT-guidance
Operator dose
Spine procedures
Fluoroscopy
Humans
Neurosurgeons
Radiation Dosage
Retrospective Studies
Spine
Tomography, X-Ray Computed
English
OBJECTIVES
To perform a pilot study to quantify the radiation dose incident on operators during CT-guided interventional spine procedures, and provide a quick method to approximate it based on the total amount of radiation reported by the CT scanner.
PATIENTS AND METHODS
Data retrospectively obtained from 26 consecutive CT-guided spine procedures, encompassing a variety of interventions. Intermittent low-dose limited-coverage CT-scanning performed using a "step and shoot" mode to visualize needle advancement. The operator wore an electronic direct dosimeter to record the dose measured above the operator's lead apron [μGy] for each procedure. Total amount of radiation used for CT-guidance quantified by the Dose-Length Product (DLP) [mGy-cm] provided by the CT scanner. The relationship between the operator's dose and the DLP was assessed.
RESULTS
Average and median operator's dose were 2.3 and 1.9 μGy, respectively, with half of these values ranging between 0.7 and 2.5 μGy. Average and median DLP values used to perform the CT-guided procedure were 58 and 54 mGy-cm respectively, and half of these values ranged between 38 and 68 mGy-cm. There was a statistically significant correlation between the operator's dose and the DLP used to perform CT-guidance (r = 0.61), with an operator's dose-DLP conversion factor of 0.04 μGy / 1 mGy-cm (range: 0.006-0.083 μGy / 1 mGy-cm).
CONCLUSIONS
In our series, the average amount of radiation used during CT guided procedures was about 50 mGy-cm (DLP), and the corresponding average operator's dose was about 2 μGy. We showed how an approximate estimate of the operator's dose could be obtained right after each procedure, based on the CT-scanner DLP output.
To perform a pilot study to quantify the radiation dose incident on operators during CT-guided interventional spine procedures, and provide a quick method to approximate it based on the total amount of radiation reported by the CT scanner.
PATIENTS AND METHODS
Data retrospectively obtained from 26 consecutive CT-guided spine procedures, encompassing a variety of interventions. Intermittent low-dose limited-coverage CT-scanning performed using a "step and shoot" mode to visualize needle advancement. The operator wore an electronic direct dosimeter to record the dose measured above the operator's lead apron [μGy] for each procedure. Total amount of radiation used for CT-guidance quantified by the Dose-Length Product (DLP) [mGy-cm] provided by the CT scanner. The relationship between the operator's dose and the DLP was assessed.
RESULTS
Average and median operator's dose were 2.3 and 1.9 μGy, respectively, with half of these values ranging between 0.7 and 2.5 μGy. Average and median DLP values used to perform the CT-guided procedure were 58 and 54 mGy-cm respectively, and half of these values ranged between 38 and 68 mGy-cm. There was a statistically significant correlation between the operator's dose and the DLP used to perform CT-guidance (r = 0.61), with an operator's dose-DLP conversion factor of 0.04 μGy / 1 mGy-cm (range: 0.006-0.083 μGy / 1 mGy-cm).
CONCLUSIONS
In our series, the average amount of radiation used during CT guided procedures was about 50 mGy-cm (DLP), and the corresponding average operator's dose was about 2 μGy. We showed how an approximate estimate of the operator's dose could be obtained right after each procedure, based on the CT-scanner DLP output.
- Language
-
- English
- Open access status
- closed
- Identifiers
-
- DOI 10.1016/j.clineuro.2018.08.015
- PMID 30107353
- Persistent URL
- https://folia.unifr.ch/global/documents/157099
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