Dual Modality Imaging (3-D Body Scan, PET/CT, SPECT/CT, Biograph, Discovery VH Hawkeye, Discovery VI Positrace, Discovery LS, Gemini)
- Norm of Dual Modality Imaging (3-D Body Scan, PET/CT, SPECT/CT, Biograph, Discovery VH Hawkeye, Discovery VI Positrace, Discovery LS, Gemini)
- Usage of Dual Modality Imaging (3-D Body Scan, PET/CT, SPECT/CT, Biograph, Discovery VH Hawkeye, Discovery VI Positrace, Discovery LS, Gemini)
- Description of Dual Modality Imaging (3-D Body Scan, PET/CT, SPECT/CT, Biograph, Discovery VH Hawkeye, Discovery VI Positrace, Discovery LS, Gemini)
- Professional considerations of Dual Modality Imaging (3-D Body Scan, PET/CT, SPECT/CT, Biograph, Discovery VH Hawkeye, Discovery VI Positrace, Discovery LS, Gemini)
Norm of Dual Modality Imaging (3-D Body Scan, PET/CT, SPECT/CT, Biograph, Discovery VH Hawkeye, Discovery VI Positrace, Discovery LS, Gemini)
Findings are interpreted by a radiologist specializing in the types of imaging used.
Usage of Dual Modality Imaging (3-D Body Scan, PET/CT, SPECT/CT, Biograph, Discovery VH Hawkeye, Discovery VI Positrace, Discovery LS, Gemini)
Cancer staging via precise localization of tumor-targeted radiopharmaceuticals; monitoring response to radioimmunotherapy. More accurate assessment of myocardial perfusion than other single-mode studies. Planning for and evaluating success of radiation therapy.
Description of Dual Modality Imaging (3-D Body Scan, PET/CT, SPECT/CT, Biograph, Discovery VH Hawkeye, Discovery VI Positrace, Discovery LS, Gemini)
Dual modality imaging combines different types of imaging techniques to simultaneously evaluate functional structure and metabolic physiology. Traditional single-mode structural imaging includes ultrafast computed tomography (CT) and magnetic resonance imaging (MRI). Traditional functional imaging that evaluates the physiology occurring in tissues includes positive emission tomography (PET) and single-photon emission computed tomography (SPECT). Dual-mode imaging combines one of the structural imaging techniques with one of the functional imaging techniques, and data are acquired by one machine containing both the x-ray component and the radionuclide detector during only one procedure. After both sets of images are acquired, computer software then merges the data and fuses the images to give results that are more sensitive and specific than a single procedure alone, and that overcomes many limitations of each single procedure. In addition, simultaneous imaging can provide improved attenuation correction and anatomic mapping and overcome issues with the body being positioned differently for tests taken at two separate times. In the 3-D Body Scan, cross-sectional CT images are fused with the metabolically-differentiated PET images to produce a single three-dimensional image that provides better detection of early heart disease, cancer, and brain disorders than either modality alone.
Professional Considerations of Dual Modality Imaging (3-D Body Scan, PET/CT, SPECT/CT, Biograph, Discovery VH Hawkeye, Discovery VI Positrace, Discovery LS, Gemini)
Consent form IS required.
Risks
See risks described for each separate mode of imaging to be combined with the specific equipment listed under Preparation, 1.
Contraindications
See contraindications described for each separate mode of imaging to be combined with the equipment listed under Preparation, 1.
Precautions
See contraindications described for each separate mode of imaging to be combined with the equipment listed under Preparation, 1.
Preparation
- See separate preparation information, depending on the modalities combined in the dual-mode imaging equipment:
- Document clinical indications on the test requisition. This helps guide the interpreter to provide the most relevant test interpretation, and it also is essential for many types of procedure reimbursement.
- Just before beginning the procedure, take a “time out” to verify the correct client, procedure, and site.
Procedure
- The client is positioned supine on the scanning table. See procedure for individual led listing
Postprocedure Care
- Assess the venous access site for infiltration.
Client and Family Teaching
- You will have to hold breath for several seconds.
- It is important to lie still for the test.
- A sensation of burning may be felt from the injection of the contrast.
Factors That Affect Results
- See individual tests as described under Preparation, 1. Factors that affect the results for all tests are considerably reduced by the dual-mode imaging technique.
Other Data
- GE Medical Systems manufactures the Discovery VH Hawkeye, Discovery VI Positrace, and Discovery LS Imaging Systems. Siemens Medical manufactures the Biography imaging system. Phillips Medical Systems manufactures the Gemini imaging system.
