Comparison of measured and estimated maximum skin doses during CT fluoroscopy lung biopsies

Zanca, Federica; Jacobs, A.; Crijns, Wouter; Wever, Walter De

doi:10.1118/1.4884231

Cited by 4 publications

(3 citation statements)

References 26 publications

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“…1). Before starting the procedure, the CT acquisition parameters should be adjusted to allow minimum irradiation for the interventional team and the patient while maintaining sufficient quality to perform the procedure without difficulties (Table 5) [53][54][55].…”

Section: Ct Protocolmentioning

confidence: 99%

“…We can modify the CT parameters to acquire the image with the minimum possible radiation while still being sufficient to perform the procedure. In this regard, several studies have published results of decreased radiation doses to the patient and the operator by modifying CT parameters such as kV, mAs, longitudinal scan length, and slice thickness in CT-guided lung biopsies [53,62,63]. Another strategy that has been shown to dramatically decrease patient radiation dose levels during CTF without significantly compromising the results and duration of the procedure is the use of intermittent multislice fluoroscopy rather than continuous single-slice fluoroscopy [56].…”

Section: Ct Protocolmentioning

confidence: 99%

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Image-guided percutaneous ablation for the treatment of lung malignancies: current state of the art

et al. 2021

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Image-guided percutaneous lung ablation has proven to be a valid treatment alternative in patients with early-stage non-small cell lung carcinoma or oligometastatic lung disease. Available ablative modalities include radiofrequency ablation, microwave ablation, and cryoablation. Currently, there are no sufficiently representative studies to determine significant differences between the results of these techniques. However, a common feature among them is their excellent tolerance with very few complications. For optimal treatment, radiologists must carefully select the patients to be treated, perform a refined ablative technique, and have a detailed knowledge of the radiological features following lung ablation. Although no randomized studies comparing image-guided percutaneous lung ablation with surgery or stereotactic radiation therapy are available, the current literature demonstrates equivalent survival rates. This review will discuss image-guided percutaneous lung ablation features, including available modalities, approved indications, possible complications, published results, and future applications.

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Section: Ct Protocolmentioning

confidence: 99%

Section: Ct Protocolmentioning

confidence: 99%

Image-guided percutaneous ablation for the treatment of lung malignancies: current state of the art

et al. 2021

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“…Measurement of dose profiles is performed using thermoluminescence dosimeters [ 8 , 9 ] or Gafchromic film [ 10 – 13 ]. A dose profile is not measured using practical thermoluminescence dosimeters with high positional resolution.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of an X-Ray Dose Profile Derived from an Optically Stimulated Luminescent Dosimeter during Computed Tomographic Fluoroscopy

2015

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The purpose of this study was to evaluate scatter radiation dose to the subject surface during X-ray computed tomography (CT) fluoroscopy using the integrated dose ratio (IDR) of an X-ray dose profile derived from an optically stimulated luminescent (OSL) dosimeter. We aimed to obtain quantitative evidence supporting the radiation protection methods used during previous CT fluoroscopy. A multislice CT scanner was used to perform this study. OSL dosimeters were placed on the top and the lateral side of the chest phantom so that the longitudinal direction of dosimeters was parallel to the orthogonal axis-to-slice plane for measurement of dose profiles in CT fluoroscopy. Measurement of fluoroscopic conditions was performed at 120 kVp and 80 kVp. Scatter radiation dose was evaluated by calculating the integrated dose determined by OSL dosimetry. The overall percent difference of the integrated doses between OSL dosimeters and ionization chamber was 5.92%. The ratio of the integrated dose of a 100-mm length area to its tails (−50 to −6 mm, 50 to 6 mm) was the lowest on the lateral side at 80 kVp and the highest on the top at 120 kVp. The IDRs for different measurement positions were larger at 120 kVp than at 80 kVp. Similarly, the IDRs for the tube voltage between the primary X-ray beam and scatter radiation was larger on the lateral side than on the top of the phantom. IDR evaluation suggested that the scatter radiation dose has a high dependence on the position and a low dependence on tube voltage relative to the primary X-ray beam for constant dose rate fluoroscopic conditions. These results provided quantitative evidence supporting the radiation protection methods used during CT fluoroscopy in previous studies.

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Evaluation of surface dose and image quality using the half-scan mode in chest computed tomography-guided interventional radiology: a phantom study

Hasegawa

Sato

Kobayashi

2018

Radiol Phys Technol

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The authors aimed to evaluate the effects of the half-scan mode on image quality and physician exposure to radiation in computed tomography (CT)-guided interventional radiology (IVR) to the right lung using an intermittent CT fluoroscopy technique for measuring phantom surface dose distribution and image noise. For the half-scan mode, settings at 0°, 90°, 180°, and 270° were used as the central axis of the X-ray exposure range on the chest phantom. With the center of the ventral side in the chest phantom defined as 0°, optically stimulated luminescent dosimeters were attached at five positions at 30° intervals on the right side of the phantom surface. Securing a space for device operation during the procedure is necessary. The couch was shifted downward by 50 mm to reproduce the conditions used for measurement in clinical settings. Image noise and contrast-to-noise ratio were measured to assess image quality; subjective evaluation was performed using simulated lung nodules placed in the phantom. The phantom surface dose distribution in the measured half-scan mode depended on the angle setting. Additionally, the phantom surface dose in the half-scan mode at the 90° setting was reduced by approximately 50%; however, image quality was clearly decreased. In CT-guided IVR to the right lung, using a lead drape and half-scan mode according to the procedural situation is important.

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Comparison of measured and estimated maximum skin doses during CT fluoroscopy lung biopsies

Cited by 4 publications

References 26 publications

Image-guided percutaneous ablation for the treatment of lung malignancies: current state of the art

Image-guided percutaneous ablation for the treatment of lung malignancies: current state of the art

Evaluation of an X-Ray Dose Profile Derived from an Optically Stimulated Luminescent Dosimeter during Computed Tomographic Fluoroscopy

Evaluation of surface dose and image quality using the half-scan mode in chest computed tomography-guided interventional radiology: a phantom study

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