IQ Biometrix FACES EDU PLUS V4.0.3 Portable ENG
IQ Biometrix FACES EDU PLUS V4.0.3 Portable ENG
the purpose of this study is to evaluate the feasibility of a portable brain and skull ct system for the localization of intracranial lesions in pediatric patients. to do this, a 3d brain reconstruction was performed based on the attenuation map obtained from a single-slice ct scan, and the lesion was detected as a bright spot. this study compares a head ct system (iq biometrix faces edu plus v4.0.3 portable eng) with the skull base system (ge healthcare, fairfield, ct, usa) and with a philips (best, netherlands) skull base system for image quality and volume of the lesion detection. patient data were acquired and analyzed at the radiological university medical center (rumc) and the german cancer research center (dkfz) in heidelberg. three different regions of interest were used: frontal, parietal, and occipital. both the iq biometrix system and the skull base system were used to acquire images in a standardized way. the three methods were compared based on image quality (iq), lesion detection, and volume. the iq biometrix faces edu plus v4.3 portable eng was used to acquire and reconstruct 3d images using the following parameters: bone + soft tissue window settings: hu: -900, width: 1500, and section thickness: 2.5 mm. the ct scan was performed using the following parameters: bone + soft tissue window settings: hu: -700, width: 1500, and section thickness: 2. to detect the lesion, the reference attenuation map of the brain was created by subtracting the gray matter from the white matter map. the reference attenuation map of the lesion was created by subtracting the white matter from the lesion attenuation map. the lesion was detected as a bright spot, and the volume was calculated. the reference attenuation maps were created for each region of interest using the following parameters: frontal region of interest (roi): hu: -700, width: 1500, and section thickness: 2.5 mm; parietal roi: hu: -700, width: 1500, and section thickness: 2.5 mm; and occipital roi: hu: -700, width: 1500, and section thickness: 2. the ct scans were performed by an experienced neuroradiologist. image analysis was performed by two independent readers. the volume of the lesion was calculated using the lesion region of interest as the region of interest of the reference attenuation map of the brain, and the volume of the lesion was calculated as the amount of difference between the reference attenuation map and the lesion attenuation map. the results were classified as follows:
In post-prostatectomy radiotherapy to the prostatic bed, consistent bladder volume is essential to maintain the position of treatment target volume. We assessed the differences between bladder volume readings from a portable bladder scanner (BS-V) and those obtained from planning CT (CT-V) or cone-beam CT (CBCT-V). Interfraction bladder volume variation was also determined. BS-V was recorded before and after planning CT or CBCT. The percentage differences between the readings using the two imaging modalities, standard deviations and 95% confidence intervals were determined. Data were analysed for the whole patient cohort and separately for the older BladderScan BVI3000 and newer BVI9400 model. Interfraction bladder volume variation was determined from the percentage difference between the CT-V and CBCT-V. Treatment duration, incorporating the time needed for BS and CBCT, was recorded. Fourteen patients were enrolled, producing 133 data sets for analysis. BS-V was taken using the BVI9400 in four patients (43 data sets). The mean BS-V was 253.2mL, and the mean CT-V or CBCT-V was 199cm(3). The mean percentage difference between the two modalities was 19.7% (SD 42.2; 95%CI 12.4 to 26.9).
Near-infrared (NIR) optical imaging modality is one of the widely used medical imaging techniques for breast cancer imaging, functional brain mapping, and many other applications. However, conventional NIR imaging systems are bulky and expensive, thereby limiting their accelerated clinical translation. Herein a new compact (6 7 12 cm3), cost-effective, and wide-field NIR scanner has been developed towards contact as well as no-contact based real-time imaging in both reflectance and transmission mode. The scanner mainly consists of an NIR source light (between 700- 900 nm), an NIR sensitive CCD camera, and a custom-developed image acquisition and processing software to image an area of 12 cm2. Phantom experiments have been conducted to estimate the feasibility of diffuse optical imaging by using Indian-Ink as absorption-based contrast agents. As a result, the developed NIR system measured the light intensity change in absorption-contrasted target up to 4 cm depth under transillumination mode. Preliminary in-vivo studies demonstrated the feasibility of real-time monitoring of blood flow changes. Currently, extensive in-vivo studies are carried out using the ultra-portable NIR scanner in order to assess the potential of the imager towards breast imaging..