SOMATOM On.site CT scanner

Siemens unveils portable head CT scanner for ICU at RSNA

December 02, 2019
by John R. Fischer, Senior Reporter
Siemens Healthineers kicked off the annual meeting of the Radiological Society of North America (RSNA) this weekend with the debut of SOMATOM On.site, a mobile head CT scanner that can be used on critically ill patients in the ICU.

The portable system does away with transporting an ICU patient to the radiology department by allowing users to perform scans right at the bedside. This eliminates potential risks to patients as well as cost of transport with high staffing requirements.

“Typically, we have to bring four or five people and transport the patient to the radiology department to do the CT scan,” Florian Belohlavek, director of global product marketing management for CT at Siemens Healthineers, told HCB News. “With this CT scanner, you have the chance to have a mobile head CT scanner, which is maneuverable and brings the scanning to the patient side.”


With SOMATOM On.site, patients remain in bed, connected to monitors and other devices. The technologist removes the headboard of the bed and rolls in its place the machine, which is equipped with a head holder to support the patient and ensure consistent positioning at the isocenter for optimal image quality. The telescopic design of the gantry moves it — and the source of radiation — away from the patient during the exam to reduce the scatter of radiation, while the base of the scanner stays in place. This, in effect, improves workflow and reduces incidents of motion-induced image artifacts.

Technologists of all experience levels can perform exams and receive consistent results with the use of the system’s intelligent user interface, myExam Companion, which relies on patient-specific questions to optimize scan parameters. Once the exam is complete, the technologist slides the patient down in the bed from the headboard, and the CT scan is automatically sent to the PACS system in minutes. An integrated drive camera offers real-time viewing for moving the system, and with an ergonomic handle attached to the machine ensures precise, intuitive positioning.

SOMATOM X.cite CT scanner
The German-based multi-tech company also showcased its premium single-source CT system, SOMATOM X.cite, which was launched last month at Zurich. The solution is the first to offer myExam Companion and is equipped with a Vectron X-ray tube for a maximum 1,200 mA High Power mode at low 70 or 80 KV stations, ensuring lower radiation dose and contrast media volumes. This allows for high image quality in a single source segment.

Its 82 cm gantry supports patient comfort, while its medical technical radiology assistants (MTRAs) prepare and perform scans through tablets attached to the scanner by magnets. The protocols established through myExam Companion help smooth differences in experience between medical technical radiology assistants for high-quality results in difficult diagnostic exams.

“MyExam Companion asks questions, such as if you have a stent, and adds information from the patient themselves, such as heart rate, to optimize the protocol for the patient,” said Belohlavek. “It means we are optimizing the clinical outcome but also the dose to the patient.”

Among other new innovations were AI-RAD Companion Brain MR for Morphometry Analysis and AI-RAD Companion Prostate MR for Biopsy Support. The former automatically segments and measures the volume of the brain in MR images to aid neurologists in diagnosis and treatment, while the latter automatically segments the prostate in scans and enables radiologists to mark lesions for targeted biopsies.

SOMATOM X.cite is available with the SOMATOM and GO CT platforms, and is FDA cleared. SOMATOM On.site is currently FDA pending.