Siemens Healthineers e.cam Single is an exclusive Single Photon Emission Computed Tomography (SPECT) imaging system for a wide variety of nuclear medicine procedures. It combines the use of a single gamma-camera detector for imaging the body and reconstructing the information from the distribution of radiopharmaceuticals into detailed functional images.

The e.cam Single is conceived with an open gantry and flexibility in the positioning of the detector so that access to patients who are on a stretcher or wheelchair is possible. It is used for nuclear medicine exams of various clinical applications and whole-body metabolic studies and imaging by SPECT.

Understanding the Core Technology

SPECT is a functional imaging technique that helps to demonstrate the functions of various tissues or organs in the body, in addition to the physical state. In a SPECT scan, a radiopharmaceutical is given to the patient, and a scan is performed. During the examination, the radiopharmaceutical goes to a specific organ or tissue, and the radioisotope emits gamma radiation as it turns into a more stable isotope.

The e.cam Single measures gamma photons with the gamma-camera detector. As images are collected from various angles around the patient, the detector registers the image of where the photons were detected and their energy. These measurements are then used to reconstruct cross-sectional SPECT images using a computer, which enables doctors to assess where and how active the radiopharmaceutical is in the body. This information is used to detect abnormalities in blood flow, bone activity, organ function, and physiological processes.

Single-Detector Gamma Camera Technology

One of the main advantages of the e. cam Single is its single-detector design. The e. cam Single is a single-detector head system that collects the imaging data needed instead of a dual-detector system. The system is both flexible for general-purpose nuclear medicine imaging and easy to access for the patient. According to documentation from Siemens, the system features an open gantry; clinicians can tilt it, and automatic body contouring to capture images of the patient's body.

The detector is used to detect the gamma radiation emitted from the radiopharmaceutical and transforms it into a digital imaging signal. The data gathered is then analyzed and reconstructed to form images of the region of interest.

Open Gantry Design

The open gantry is an important aspect of e. cam Single's construction. Open is a better configuration for access to the patient for positioning and imaging, as opposed to enclosed systems. It is helpful for patients who need positioning support or if they are transported in a stretcher or wheelchair. Gurney and wheelchair access is unhindered in the system, offering convenience to the nuclear medicine staff with patient positioning. The open design also reduces the patient's claustrophobic sensations during examination.

Automatic Body Contouring

The e.cam Single also features built-in body contouring for SPECT and whole-body imaging. Spatial resolution is important to obtain during SPECT acquisition, as the distance between the detector and the patient's body is important for acquiring useful spatial resolution. The automatic body contouring function aids the detector in following the body contour of the patient as they are scanned. This feature helps ensure the same detector position and optimizes image acquisition.

Detector Tilt and Positioning Flexibility

The detector assembly offers caudal and cephalic tilt functionality, so that the detector can be tilted, depending on the anatomical region and examination requirements. This flexibility is helpful for imaging various areas and allows technicians to place the detector in the right position around the patient. The system also has the advantage of flexible detector positioning to enhance its comprehensive clinical performance.

SPECT and Whole-Body Imaging

The e.cam Single is suitable for both SPECT and whole-body acquisitions. SPECT imaging collects 3-D functional data; several views around the patient are obtained and then combined to create cross-sectional images. Whole-body nuclear medicine imaging, on the other hand, provides information on the distribution of radiopharmaceuticals throughout a wider area of the body. This is helpful in assessing situations with more than one skeletal area or determining areas of abnormal tracer uptake. The e.cam Single, which has both acquisition modes, is suitable for a variety of routine nuclear medicine examinations.

Collimator Technology

Collimators are a vital part of gamma-camera image formation. They are located in front of the detector and determine which gamma photons can reach the detector based on direction. The e.cam Single is configured to utilize a wide range of collimators to enable this system to be used for a variety of different nuclear medicine examinations and different radionuclides. Choosing the right collimator can affect a variety of things, including resolution and/or sensitivity.

Image Processing and Reconstruction

Once the photons have been detected from many different angles, the data (projections) must be reconstructed into cross-sectional images. The e.cam Single is associated with the syngo-based e.soft workstation, which provides the computing environment for image processing and nuclear medicine workflow. Reconstructed images enable physicians to view the uptake of the radiopharmaceuticals throughout the field of view and to determine if there is abnormal physiologic activity in certain locations. Depending on the examination, different planes of images are evaluated for a comprehensive understanding of the functional information.

Workflow and Clinical Flexibility

The e.cam Single is a dual-head nuclear medicine imaging system that is developed to be a versatile solution, prioritizing flexibility in patient access and a streamlined workflow. Its key workflow-oriented features include:

• Open gantry configuration.
• Single-detector design.
• Automatic body contouring.
• Caudal and cephalic detector tilt.
• SPECT acquisition.
• Whole-body acquisition.
• Wide range of available collimators.
• syngo-based e.soft workstation.

The advantages enable nuclear medicine workers to utilize the system for various examinations and patients' needs.

Clinical Applications

SPECT can provide important functional information across several medical specialties. The specific examination and radiopharmaceutical used depend on the clinical indication.

Bone Imaging

Bone scintigraphy and SPECT can be used to assess areas of abnormal bone metabolism. Applications may include:

• Detection of areas of increased or decreased bone activity.
• Evaluation of suspected skeletal abnormalities.
• Assessment of certain bone and joint conditions.
• Evaluation of selected cases of suspected metastatic bone disease.

Cardiology

SPECT plays an important role in nuclear cardiology, particularly in myocardial perfusion imaging. Cardiac SPECT can help evaluate:

• Blood flow to the heart muscle.
• Differences between stress and rest perfusion.
• Areas of reduced myocardial perfusion.
• Functional information relevant to coronary artery disease.

Neurology

SPECT can also be used for selected neurological examinations where assessment of regional cerebral blood flow or other functional information is clinically required. Depending on the radiopharmaceutical and protocol, SPECT may support evaluation of certain neurological disorders.

Renal Imaging

Nuclear medicine renal studies can provide functional information about the kidneys. These examinations may help assess:

• Relative renal function.
• Renal perfusion.
• Urinary drainage.
• Functional differences between the kidneys.

Hepatobiliary Imaging

SPECT and nuclear medicine imaging can also be used in selected hepatobiliary examinations to evaluate the distribution and movement of radiopharmaceuticals through the liver and biliary system.

Endocrine and Other Nuclear Medicine Applications

SPECT imaging can also support selected examinations involving organs and tissues such as the thyroid and parathyroid glands, depending on the radiopharmaceutical and clinical protocol.

Advantages of the Siemens Healthineers e.cam Single

The e.cam Single offers several practical advantages for nuclear medicine imaging:

• Open gantry design provides easy patient access.
• Single-detector configuration offers a flexible solution for general-purpose SPECT.
• Automatic body contouring supports consistent detector positioning.
• Detector tilt capability allows flexible positioning for different examinations.
• SPECT and whole-body acquisition expand its clinical applications.
• Wide collimator selection supports different nuclear medicine protocols.
• Wheelchair and gurney accessibility can make positioning easier for patients with limited mobility.
• syngo-based e.soft workstation supports image processing and workflow.

Patient Experience and Comfort

Patient positioning is an important part of any nuclear medicine examination. The e.cam Single's open gantry provides a less enclosed imaging environment and allows easier access to the patient. Its design also accommodates patients arriving on wheelchairs or gurneys, which can simplify transfers and positioning for individuals with limited mobility. The flexible detector positioning and automatic body contouring further support practical image acquisition while maintaining appropriate detector positioning around the patient.

Importance of SPECT Technology in Molecular Diagnostics and Therapy

The availability of a Siemens Healthineers e.cam Single SPECT system strengthens the nuclear medicine imaging capabilities of Molecular Diagnostics and Therapy. SPECT provides functional information that complements anatomical imaging techniques such as CT and MRI. By showing the distribution of radiopharmaceuticals within organs and tissues, SPECT can help physicians evaluate physiological processes that may not be visible through structural imaging alone.

The Siemens Healthineers e.cam Single's combination of flexible detector positioning, open gantry design, automatic body contouring, and SPECT/whole-body acquisition makes it a versatile platform for nuclear medicine examinations. At Molecular Diagnostics and Therapy, this technology supports the centre's focus on providing specialized diagnostic imaging through established nuclear medicine technology.

Conclusion

The Siemens Healthineers e.cam Single is a versatile single-detector SPECT system designed for general nuclear medicine imaging. It is an open gantry; the ability to move the detector and the automatic body contouring system, combined with the whole-body acquisition system and wide collimator options, make it ideal for a variety of clinical uses.

Also, SPECT allows the physician to obtain images showing the physiological activity in the organ or tissue after administering radiolabelled molecules, converting gamma radiation emitted by the organ or tissue into functional images. For Molecular Diagnostics and Therapy, the Siemens Healthineers e.cam Single represents an important nuclear medicine technology that supports functional imaging and contributes to comprehensive diagnostic evaluation.