Factors affecting transtemporal window quality in transcranial sonography

Abstract

Objective: To assess the influencing factors of transtemporal window quality and identify patients suitable for transcranial sonography (TCS) examination in twodimensional imaging. Methods:In this cross-sectional study, TCS was performed in 161 consecutive patients through the temporal bone window (TBW) in the neurology or neurosurgery department. Each patient's sex, age, height, weight, and temporal bone thickness (TBT) were collected. After examination, the patients were divided into two groups: TBW success and TBW failure. The data were statistically compared between the two groups.Results: Among the studied population, the total TBW success rate was 80.1% (95% confidence interval [CI]: 74-86). The TBW success rate was 91.4% (95% CI: 85-98) in males and 70.9% (95% CI: 61-81) in females (p = .001). Sex (p = .001), age (p = .002), height (p = .047), and TBT (p < .001) showed significant differences between the TBW success and failure groups. In males, only TBT (p = .001) showed a significant difference; in females, age (p < .001) and TBT (p = .003) showed a significant difference. The area under the receiver operating characteristic curve (AUC) of sex, age, and TBT and their combination was 0.686, 0.659, 0.842, and 0.922 (p < .001), respectively. The AUC of the combination of parameters was significantly greater than that of age and sex alone (p = .007; p = .0002) but not greater than that of TBT (p = .090). Conclusions:The TBW success rate varied with sex, age, height, and TBT. Males, younger patients, taller patients, and patients with a thinner temporal bone tended to be more suitable for the examination by TCS.

Development of a prediction model for facilitating the clinical application of transcranial color-coded duplex ultrasonography

“…In our study, Skull thickness was measured simultaneously during TCCD examination, which makes it possible to use skull thickness to rapidly determine whether the temporal window was penetrated by ultrasound. The skull thickness values of all patients included were different from those measured by ultrasound in this study ((1.02(0.94, 1.08)) and CT in other studies ((3.1 ± 0.9 mm) [ 11 ]; (0.27 ± 0.06) [ 12 ]). However, the temporal soft tissue thickness value (0.56 ± 0.12) measured by ultrasound in He et al [ 12 ] study was more than twice the temporal bone thickness value (0.27 ± 0.06) measured by CT.…”

“…The skull thickness values of all patients included were different from those measured by ultrasound in this study ((1.02(0.94, 1.08)) and CT in other studies ((3.1 ± 0.9 mm) [ 11 ]; (0.27 ± 0.06) [ 12 ]). However, the temporal soft tissue thickness value (0.56 ± 0.12) measured by ultrasound in He et al [ 12 ] study was more than twice the temporal bone thickness value (0.27 ± 0.06) measured by CT. It can be seen that, combined with the content shown in Fig.…”

“…There is no standard for this operation. Existing studies had used computed tomography (CT) to study the relationship between skull thickness and ultrasound penetrativity [ 11 , 12 ]. In our study, Skull thickness can be measured simultaneously during TCCD examination.…”

From scalp to cortex, the whole isn’t greater than the sum of its parts: introducing GetTissueThickness (GTT) to assess age and sex differences in tissue thicknesses

“…The copyright holder for this preprint (which this version posted April 19, 2023. ; https://doi.org/10.1101/2023.04.18.537177 doi: bioRxiv preprint the detrimental effects of bone (Badran et al 2020;Guo et al 2021;na and Wang 2021;He et al 2022). Furthermore, we observed significant differences in compact bone thickness across many channels, with older women generally having the highest values and younger men having the lowest values.…”

Brain injury mobile diagnostic system: Applications in civilian medical service and on the battlefield—General concept and medical aspects

“…In clinical practice, the acoustic window can be opaque to ultrasounds, affecting up to 15–20% of the population 35 and occurring more often in females 36 . This seems to be the biggest limitation of the MDS.…”