# OpenCare5G: O-RAN in Private Network for Digital Health Applications
## 4 Experimental Evaluation
### Proof of Concept 1  
We performed the PoC-1-1 with a verification test of the latency and bandwidth of the ultrasound exam, by capturing files over the 5G network from Philips portable equipment, model Luminy, type C5-2 Transducer. Its technical specifications are as follows:  
* Model Limity C5-2 transducer;
* Curved broadband;
* Operating frequency range from 2 to 5 MHz;
* Curvature radius of 50 mm;
* 2D color Doppler imaging, M-mode, advanced XRES for multivariate harmonic imaging, SonoCT;
* High-resolution diagnostic imaging for deeper applications: preconfigured enhancements for abdominal, gallbladder, gynecology/obstetrics and lung imaging;
* Central venous catheter marker;
* USB-C Transducer. We performed PoC-1-2 with a latency verification test and ultrasound scan bandwidth, by capturing the files over the 5G network from Mobisson portable equipment, model M3. Its technical specifications are as follows:  
* Transducer: Model M3;
* Convex;
* Weight: 240 g;
* Wireless;
* Operating Frequency Range from 3.5 to 5 MHz;* Depth from 90 to 280 mm;
* 3-h autonomy in continuous use, 6-hour in standby;
* Features: Harmonics, Sector Gain, Noise Smoothing;
* Applications: Performs abdominal and cardiac ultrasound, obstetrical and prenatal exams, renal evaluations and quick identification of lesions and internal bleeding. Performing Ultrasound Exams on PoC-1-1 and PoC-1-2  
The PoC-1-1 tests were performed with the Philips portable ultrasound examination equipment. Figure 16 shows the patient lying on a stretcher, with the USG procedure in the abdomen being performed by Dr. 1, an interventional and endovascular surgery radiologist at HCFMUSP. The other professional, Dr. 2, an interventional radiologist, handled the screens for analysis of the ultrasound of the patient lying on the stretcher at a distance, analyzing the cameras where the patient was in the process of telemedicine. He observed and analyzed the test process with Dr. 1, conducting real-time guidance on the distance ultrasound, in addition to capturing the images to store them, and later carry out the clinical report of the exam. That is, the focus was on the medical assessment of the equipment use case by Dr. [PERSON] He subjectively assessed whether, with the proposed new O-RAN 5G architecture, there will be an improvement or not in the results collected from the images derived from the ultrasound equipment in the PoC-1 tests. The PoC 1 was carried out on 26 October 2022 on the second floor of the InRad building, where project antenna A is located, and in the radio intervention department where antenna B is located. The 5G signal was generated in the Airspan Core from the datacenter in Itai located 9 km from HCFMUSP. In the location of Antenna A (Doctor Central Room), there was a notebook connected to the dedicated CPE to receive the 5G signal dissipated by the antenna installed there. This machine had a headset and a dedicated webcam. In the locality, radiologist Dr. [PERSON] was responsible for receiving the images and directing the other professional with guidelines for conducting the USG transducer. The portable point-of-care USG equipment used for this PoC was the Philips Lumify, which has a dedicated application for transmitting images in real-time, called Reacts. The proposal to use the Philips-Lumify equipment was because it was the only equipment that had an accompanying streaming application that provided quality, real-time images at the time of PoC-1 so that the guiding physician could offer remote guidance within the scope from the project. Other streaming platforms tested before PoC-1 showed lower image-quality results. Figure 16: Doctor 1 performing ultrasound on the patient. At the location of antenna B, a Samsung T515 tablet was anchored to the 5G network, connected via Wi-Fi 6 to the 5G CPE that receives the signal dissipated in the environment. The Philips-Lumify product application was installed on the tablet, which, when connecting the transducer via cable to the device, enabled the application to view the USG images to be captured.