The effective dose assessment of C-arm CT in hepatic arterial embolisation therapy

Tyan, Y. L.; Li, Yuanyuan; Ku, Ming-Chang; HH, Huang; Chen, Tou-Rong

doi:10.1259/bjr.20120551

Cited by 12 publications

(8 citation statements)

References 18 publications

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“…The x-ray exposure may vary between manufacturers depending on parameters such as tube voltage, tube current, filter thickness and material, and number of projections (42–45). The estimated effective dose to the patient for one CBCT scan of the abdomen is approximately 3–10 mSv, approximately three to four times less than the comparable dose in an abdominal multidetector CT scan (10–12 mSv) (41,43,46).…”

Section: Cbct Imaging: How It Workmentioning

confidence: 99%

How I Do It: Cone-Beam CT during Transarterial Chemoembolization for Liver Cancer

Tacher¹,

Radaelli²,

Lin³

et al. 2015

Radiology

149

119

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Cone-beam computed tomography (CBCT) is an imaging technique that provides computed tomographic (CT) images from a rotational scan acquired with a C-arm equipped with a flat panel detector. Utilizing CBCT images during interventional procedures bridges the gap between the world of diagnostic imaging (typically three-dimensional imaging but performed separately from the procedure) and that of interventional radiology (typically two-dimensional imaging). CBCT is capable of providing more information than standard two-dimensional angiography in localizing and/or visualizing liver tumors (“seeing” the tumor) and targeting tumors though precise microcatheter placement in close proximity to the tumors (“reaching” the tumor). It can also be useful in evaluating treatment success at the time of procedure (“assessing” treatment success). CBCT technology is rapidly evolving along with the development of various contrast material injection protocols and multiphasic CBCT techniques. The purpose of this article is to provide a review of the principles of CBCT imaging, including purpose and clinical evidence of the different techniques, and to introduce a decision-making algorithm as a guide for the routine utilization of CBCT during transarterial chemoembolization of liver cancer.

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Section: Cbct Imaging: How It Workmentioning

confidence: 99%

How I Do It: Cone-Beam CT during Transarterial Chemoembolization for Liver Cancer

Tacher¹,

Radaelli²,

Lin³

et al. 2015

Radiology

149

119

View full text Add to dashboard Cite

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“…No batch selection was performed due to the limited number of TLDs available. Along with a solid-state detector (Barracuda MDP, RTI Electronics, Inc., Mölndal, Sweden), a diagnostic x-ray system (Siemens Axiom Aristos Vx Plus, Germany) from Chung Shan Medical Hospital was used to calibrate TLDs, similar to the procedure of Tyan et al (2013). All the TLDs on a TLD plate were irradiated using the x-ray system (tube voltage: 121 kVp; tube output: 20mAs; inherent filtration: 2.92 mm of aluminum), and the dose response (nC) was obtained for each TLD from a Harshaw model 3500 reader (Thermo Fisher Scientific, Marietta, OH).…”

Section: Validation Studies Of MC Simulation Experimentsmentioning

confidence: 99%

Noninvasive measurement of radiopharmaceutical time–activity data using external thermoluminescent dosimeters (TLDs)

Lu¹,

Dong²,

Lin³

et al. 2017

Phys. Med. Biol.

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In this study, we present a new method for estimating the time-activity data using serial timely measurements of thermoluminescent dosimeters (TLDs). The approach is based on the combination of the measurement of surface dose using TLD and Monte Carlo (MC) simulation to estimate the radiopharmaceutical time-activity data. It involves four steps: (1) identify the source organs and outline their contours in computed tomography images; (2) compute the S values on the body surface for each source organ using a MC code; (3) obtain a serial measurement of the dose with numerous TLDs placed on the body surface; (4) solve the dose-activity equation to generate organ cumulative activity for each period of measurement. The activity of each organ at the time of measurement is simply the cumulative activity divided by the timespan between measurements. The usefulness of this method was studied using a MC simulation based on an Oak Ridge National Laboratory mathematical phantom with F-FDG filled in six source organs. Numerous TLDs were placed on different locations of the surface and were repeatedly read and replaced. The time-activity curves (TACs) of all organs were successfully reconstructed. Experiments on a physical phantom were also performed. Preliminary results indicate that it is an effective, robust, and simple method for assessing the TAC. The proposed method holds great potential for a range of applications in areas such as targeted radionuclide therapy, pharmaceutical research, and patient-specific dose estimation.

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“…While previous studies have explored the role of CBCT in interventional procedures [ 3 , 6 , 10 ], there has been limited research specifically focusing on the radiation dose associated with CBCT image acquisition. Some studies have employed phantoms to estimate the dose of CBCT, but the corresponding results have shown significant variations due to the different methodologies used for estimating the effective dose (ED) [ 12 , 13 , 14 , 15 , 16 , 17 ]. Direct measurement of ED may be affected by differences in phantom size or material.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Radiation Exposure and Influential Factors in Cone-Beam Computed Tomography (CBCT) of the Head and Abdomen during Interventional Procedures

Li,

Qu,

Zhang

et al. 2024

Tomography

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Cone-beam computed tomography (CBCT) is a widely used imaging technique in interventional radiology. Although CBCT offers great advantages in terms of improving comprehension of complex angioarchitectures and guiding therapeutic decisions, its additional degree of radiation exposure has also aroused considerable concern. In this study, we aimed to assess radiation exposure and its influential factors in patients undergoing CBCT scans of the head and abdomen during interventional procedures. A total of 752 patients were included in this retrospective study. Dose area product (DAP) and reference air kerma (RAK) were used as measures of patient dose. The results showed that the median values of DAP were 53.8 (50.5–64.4) Gy⋅cm2 for head CBCT and 47.4 (39.6–54.3) Gy⋅cm2 for that of the abdomen. Male gender and body mass index (BMI) were characterized by increased DAP and RAK values in both head and abdominal CBCT scans. Larger FOV size was associated with a higher DAP but a lower RAK value, especially in head CBCT scans. Exposure parameters under automatic exposure control (AEC) also varied according to patient BMI and gender. In conclusion, the patients received slightly higher radiation doses from head CBCT scans than from those applied to the abdomen. BMI, gender, and FOV size were the key factors that influenced the radiation dose administered to the patients during CBCT scans. Our results may help to define and minimize patients’ exposure to radiation.

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The effective dose assessment of C-arm CT in hepatic arterial embolisation therapy

Abstract: Objective: To assess the effective dose of the liver C-arm computed tomography (CT) scan during hepatic arterial embolisation surgery with clinical dose-area product (DAP) data from Taiwan. Methods

Cited by 12 publications

References 18 publications

How I Do It: Cone-Beam CT during Transarterial Chemoembolization for Liver Cancer

How I Do It: Cone-Beam CT during Transarterial Chemoembolization for Liver Cancer

Noninvasive measurement of radiopharmaceutical time–activity data using external thermoluminescent dosimeters (TLDs)

Evaluation of Radiation Exposure and Influential Factors in Cone-Beam Computed Tomography (CBCT) of the Head and Abdomen during Interventional Procedures

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