Square-shaped alopecia after embolization of intracranial aneurysm: case report and review

Román-Sainz, Jorge; Silvestre-Torner, Nicolás; Gruber-Velasco, Fernando; Romero-Jiménez, Belén; Lobato‐Berezo, Alejandro; Imbernón-Moya, Adrián

doi:10.5826/dpc.1203a93

Cited by 1 publication

(1 citation statement)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, P KA is defined as the product of the air kerma and irradiation field area, which was larger in W-HR CBCT with a larger FOV size. Several skin injuries due to radiation have been reported in the field of INR [29][30][31][32]. These factors are associated with prolonged fluoroscopy, increased DSA exposure, and repeated procedures [33][34][35][36][37].…”

Section: Discussionmentioning

confidence: 99%

Image Quality and Radiation Dose of Conventional and Wide-Field High-Resolution Cone-Beam Computed Tomography for Cerebral Angiography: A Phantom Study

Kawauchi,

Chida,

Hamada

et al. 2023

Tomography

View full text Add to dashboard Cite

There has been an increase in the use of interventional neuroradiology procedures because of their non-invasiveness compared to surgeries and the improved image quality of fluoroscopy, digital subtraction angiography, and rotational angiography. Although cone-beam computed tomography (CBCT) images are inferior to multi-detector CT images in terms of low-contrast detectability and lower radiation doses, CBCT scans are frequently performed because of their accessibility. This study aimed to evaluate the image quality and radiation dose of two different high-resolution CBCTs (HR CBCT): conventional (C-HR CBCT) and wide-field HR CBCT (W-HR CBCT). The modulation transfer function (MTF), noise power spectrum (NPS), and contrast-to-noise ratio (CNR) were used to evaluate the image quality. On comparing the MTF of C-HR CBCT with a 256 × 256 matrix and that of W-HR CBCT with a 384 × 384 matrix, the MTF of W-HR CBCT with the 384 × 384 matrix was larger. A comparison of the NPS and CNR of C-HR CBCT with a 256 × 256 matrix and W-HR CBCT with a 384 × 384 matrix showed that both values were comparable. The reference air kerma values were equal for C-HR CBCT and W-HR CBCT; however, the value of the kerma area product was 1.44 times higher for W-HR CBCT compared to C-HR CBCT. The W-HR CBCT allowed for improved spatial resolution while maintaining the image noise and low-contrast detectability by changing the number of image matrices from 256 × 256 to 384 × 384. Our study revealed the image characteristics and radiation dose of W-HR CBCT. Given its advantages of low-contrast detectability and wide-area imaging with high spatial resolution, W-HR CBCT may be useful in interventional neuroradiology for acute ischemic stroke.

show abstract