Dedicated mobile volumetric cone-beam computed tomography for human brain imaging: A phantom study

Ryu, Jong-Hyun; Kim, Tae-Hoon; Jeong, Chang-Won; Jun, Hong-Young; Heo, Dong-Woon; Lee, Jin-Seok; Kim, Kyong-Woo; Yoon, Kwon‐Ha

doi:10.3233/xst-150502

Cited by 3 publications

(3 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The SNR and CNR were calculated as the ratio of the lead bar (0.05 mm thick) value to noise and the ratio of the lead bar-air contrast to noise, respectively [16]. Mean SNR and CNR values were obtained from six image sets using the developed PDR system.…”

Section: Methodsmentioning

confidence: 99%

Development of Portable Digital Radiography System with a Device for Monitoring X-ray Source-Detector Angle and Its Application in Chest Imaging

Kim

Heo

Jeong

et al. 2017

Sensors

Self Cite

View full text Add to dashboard Cite

This study developed a device measuring the X-ray source-detector angle (SDA) and evaluated the imaging performance for diagnosing chest images. The SDA device consisted of Arduino, an accelerometer and gyro sensor, and a Bluetooth module. The SDA values were compared with the values of a digital angle meter. The performance of the portable digital radiography (PDR) was evaluated using the signal-to-noise (SNR), contrast-to-noise ratio (CNR), spatial resolution, distortion and entrance surface dose (ESD). According to different angle degrees, five anatomical landmarks were assessed using a five-point scale. The mean SNR and CNR were 182.47 and 141.43. The spatial resolution and ESD were 3.17 lp/mm (157 μm) and 0.266 mGy. The angle values of the SDA device were not significantly difference as compared to those of the digital angle meter. In chest imaging, the SNR and CNR values were not significantly different according to the different angle degrees. The visibility scores of the border of the heart, the fifth rib and the scapula showed significant differences according to different angles (p < 0.05), whereas the scores of the clavicle and first rib were not significant. It is noticeable that the increase in the SDA degree was consistent with the increases of the distortion and visibility score. The proposed PDR with a SDA device would be useful for application in the clinical radiography setting according to the standard radiography guidelines.

show abstract

Section: Methodsmentioning

confidence: 99%

Development of Portable Digital Radiography System with a Device for Monitoring X-ray Source-Detector Angle and Its Application in Chest Imaging

Kim

Heo

Jeong

et al. 2017

Sensors

Self Cite

View full text Add to dashboard Cite

show abstract

“…The X-ray source can generate 50 to 130 kV and 4 to 18 mA with a 500 mm focal spot size. [6] The field of view of the mobile CBCT for lung imaging is 236 mm (XY) Â 176 mm (Z), and the voxel size is 230 mm 3 in 1024 (XY) Â 1024 (Z). The shortest scan time of this volumetric CBCT is 7 seconds.…”

Section: Case Presentationmentioning

confidence: 99%

“…This machine uses an anode cone-beam X-ray source and a flat-panel detector with an amorphous silicon image sensor. The X-ray source can generate 50 to 130 kV and 4 to 18 mA with a 500 μm focal spot size [6] . The field of view of the mobile CBCT for lung imaging is 236 mm ( XY ) × 176 mm ( Z ), and the voxel size is 230 μm 3 in 1024 ( XY ) × 1024 ( Z ).…”

Section: Case Presentationmentioning

confidence: 99%

Mobile computed tomography for the efficient allocation of medical resources in patients with COVID-19 pneumonia

et al. 2021

View full text Add to dashboard Cite

Rationale:The highly contagious Coronavirus 2019 (COVID-19) infection raise social and economic burden. Medical staff and resources are being diverted for the care of patients with COVID-19. There are problems for healthcare systems, including burnout syndrome for the medical staff and exhaustion of medical resources.Patient concerns:The patient was a 65-year-old woman presenting with fever, cough, and dyspnea due to COVID-19 pneumonia. She received antiviral agents, broad-spectrum antibiotics, and conservative treatment. Although her clinical condition improved, there was no significant improvement in portable chest X-ray results.Diagnoses:Due to concerns over the propagation of infection when transferring to patients for scanning and the need for excessive medical personnel to move patients, we moved a mobile chest computed tomography (CT) machine to an isolation ward for CT scanning.Interventions:We report our experience using mobile chest CT to effectively allocate medical resources and assess treatment response in patient with COVID-19 pneumonia.Outcomes:Follow-up mobile CT scans disclosed progressive resolution of the multifocal ground-glass opacities and mixed consolidations distributed peripheral to subpleural spaces. During the mobile chest CT scan, there were no adverse or unforeseen events. Three medical personnel were required to performed mobile chest CT, including a clinician, a nurse, and a radiologist.Lessons:As a result of using mobile chest CT on COVID-19 patients, the number of medical personnel required for CT scanning decreased by about 83%, rapid, and safe compared with a patient who performed conventional CT.

show abstract

Implementation of a computer-aided detection tool for quantification of intracranial radiologic markers on brain CT images

Aghaei

Ross

et al. 2017

SPIE Proceedings

View full text Add to dashboard Cite

Dedicated mobile volumetric cone-beam computed tomography for human brain imaging: A phantom study

Abstract: Using this CBCT under optimal imaging acquisition conditions, it is possible to obtain human brain images with low radiation dose, reproducible image quality, and fast scan time.

Cited by 3 publications

References 27 publications

Development of Portable Digital Radiography System with a Device for Monitoring X-ray Source-Detector Angle and Its Application in Chest Imaging

Development of Portable Digital Radiography System with a Device for Monitoring X-ray Source-Detector Angle and Its Application in Chest Imaging

Mobile computed tomography for the efficient allocation of medical resources in patients with COVID-19 pneumonia

Implementation of a computer-aided detection tool for quantification of intracranial radiologic markers on brain CT images

Contact Info

Product

Resources

About