PET Scan

Researchers are studying whether 68Ga-FAPI PET/CT scans can be a new effective way to evaluate axillary lymph nodes after neoadjuvant treatment in women with breast cancer. This observational study focuses on patients who have clinically positive axillary lymph nodes and have undergone treatment before surgery. The goal is to understand if this imaging method can better detect remaining cancer in lymph nodes compared to traditional methods. Participants will have a 68Ga-FAPI PET/CT scan after completing at least three courses of neoadjuvant therapy and before surgery. This scan is being evaluated for its ability to detect residual disease in the lymph nodes without being affected by blood glucose levels, offering potentially clearer imaging. The study will observe participants without altering their treatment, focusing on this imaging test. During the study, participants will undergo the PET/CT scan, and researchers will track how well the scan predicts residual cancer in the lymph nodes after treatment. They will measure the sensitivity and specificity of the scan up to the time of surgery, and follow participants for up to three years to see how well the scan predicts invasive disease-free survival and overall survival. Participants' usual care will continue throughout the study, which starts in August 2024 and ends in June 2026.

This research aims to assess the diagnostic value of a new PET/CT imaging probe called 68Ga-C1, which specifically targets the CAIX protein found in about 95% of clear cell renal cell carcinomas. The study will also investigate the safety, tolerability, and radiation exposure from 68Ga-C1. Researchers will compare this new imaging method with the standard 18F-FDG PET/CT scan in Chinese patients who have unclear kidney masses or confirmed clear cell renal cell carcinoma. Participants with suspected or confirmed clear cell renal cell carcinoma will receive an intravenous injection of 68Ga-C1 at a dose of 0.05-0.10 mCi/kg, followed by PET imaging. They will also undergo a whole-body 18F-FDG PET/CT scan within one week. This approach allows direct comparison of the two imaging techniques in the same patients. During the study, participants will have PET/CT scans with both imaging agents to evaluate tumor detection and characteristics. Researchers will measure diagnostic accuracy, radiation dosimetry, and quantitative uptake of 68Ga-C1 over one year. Correlation with tumor pathology will also be assessed. The study will monitor safety and tolerability throughout, with the overall participation lasting at least one year.

Researchers are investigating the diagnostic potential of a new molecular imaging probe called gallium 68-labelled fibroblast-activation protein inhibitor (68Ga-FAPI) in detecting various malignant tumors. Fibroblast-activation protein (FAP) is commonly found in cancer-associated fibroblasts within tumor tissue and plays a role in tumor growth and spread. This study aims to confirm the advantages of 68Ga-FAPI over traditional imaging methods like 18F-fluorodeoxyglucose (18F-FDG) PET/CT, which can sometimes give false positive or negative results in certain cancers. Participants who have undergone whole-body 18F-FDG PET/CT scans for suspected or confirmed malignancies, particularly tumors with low FDG uptake such as glioma, hepatocellular carcinoma, renal cancer, gastrointestinal cancer, and peritoneal metastases, will receive a whole-body 68Ga-FAPI PET/CT scan within one to four weeks. The 68Ga-FAPI is injected intravenously with a dose based on body weight, and imaging is performed 20 to 60 minutes after injection. This interventional study evaluates how well 68Ga-FAPI PET/CT can diagnose and stage malignant tumors. During the study, participants will undergo the 68Ga-FAPI PET/CT scan and be monitored for diagnostic sensitivity and specificity over three years. Researchers will also assess the prognostic value of FAPI PET parameters up to one year post-treatment, evaluate therapeutic response within one week after completion of therapy, and explore correlations between PET imaging and histopathological biomarkers within four weeks of the scan. The study includes informed consent and follow-up assessments to understand the imaging method's overall effectiveness in managing cancer.

Researchers are investigating a new imaging agent called 68Ga-FAPI-LM3, which targets two receptors (SSTR2 and FAP) and may help in diagnosing diseases with SSTR2 positive expression. This study evaluates the safety, how the agent spreads in the body, and the radiation dose it delivers in healthy volunteers. Additionally, it compares the usefulness of 68Ga-FAPI-LM3 PET/CT scans with the standard 18F-FDG PET/CT scans in patients with SSTR2 positive diseases. Participants receive a single intravenous injection of both 18F-FDG and 68Ga-FAPI-LM3, followed by PET/CT imaging within a specified time frame. Some participants may also have an additional PET/CT scan using 68Ga-FAPI-46 for comparison. The study measures how well 68Ga-FAPI-LM3 detects lesions compared to 18F-FDG, using maximum standard uptake value (SUVmax) and counting the number of positive lesions. During the study, participants undergo PET/CT scans to assess lesion uptake and distribution of the imaging agents. Researchers record the number of lesions detected and evaluate diagnostic accuracy within 30 days. Safety and radiation dosimetry are monitored in healthy volunteers. The total duration of participation varies, with the primary outcome assessed at 30 days and secondary outcomes at 2 days after imaging.

Researchers are evaluating the use of 68Ga-grazytracer PET imaging to help diagnose pseudoprogression in lung cancer patients after immunotherapy. Pseudoprogression is difficult to distinguish with current clinical methods, which often require follow-up observations that may not meet clinical needs. This study aims to assess the effectiveness and feasibility of this novel imaging agent, which targets granzyme B to show the activity of cytotoxic T cells in tumor areas. This observational study uses 68Ga-grazytracer PET/CT scans to visualize and semi-quantitatively measure granzyme B concentration in lung cancer lesions that have enlarged or developed new lesions after immune checkpoint inhibitor treatment. The study follows patients for 4-8 weeks, up to a maximum of 12 weeks, to evaluate the diagnostic performance of this imaging method in detecting pseudoprogression. Participants will undergo PET/CT imaging and be monitored over the follow-up period to assess changes and outcomes. Researchers will collect data on diagnostic accuracy and safety during this time. The study includes adult lung cancer patients aged 18 to 75 years who meet specific clinical criteria and have a life expectancy of at least six months. Total participation duration varies with the follow-up period, and patient compliance with study requirements is monitored throughout.

Researchers are evaluating a new imaging method using 68Ga-MY6349 PET/CT to detect Trop-2 expression in tumor lesions of patients with solid tumors. This study aims to compare the effectiveness of this new PET radiotracer with the standard 18F-FDG PET/CT imaging to identify patients who may benefit from Trop-2 targeted imaging. The study is observational and involves patients with various types of malignant tumors, either newly diagnosed or previously treated. Participants receive a single intravenous injection of the 68Ga-MY6349 tracer and then undergo PET/CT imaging within a set timeframe. They also undergo standard-of-care imaging with 18F-FDG PET/CT either for initial assessment or to detect tumor recurrence. The uptake of the tracer in tumors is measured by the maximum standard uptake value (SUVmax) and compared visually to the standard imaging results. During the study, researchers will assess the feasibility of using 68Ga-MY6349 PET/CT for non-invasive evaluation of Trop-2 expression in tumors. Participants will have both imaging tests and their tumor lesions will be documented and analyzed. The primary focus is on imaging accuracy and tracer uptake within one week. This study is sponsored by The First Affiliated Hospital of Xiamen University and involves adults aged 18 years or older with solid tumors.

Researchers are studying a new imaging agent called 68Ga-PSFA, which targets two receptors, PSMA and FAP, to improve the diagnosis of diseases that express these markers. This early phase 1 trial aims to evaluate the safety, distribution in the body, and diagnostic potential of this PET radiotracer for detecting lesions in patients with PSMA or FAP positive diseases. Participants will receive a single intravenous injection of 68Ga-PSFA. This administration is designed to allow imaging of disease sites expressing the PSMA or FAP markers. No placebo or comparison group is involved, and the study focuses on one treatment arm where all patients receive the investigational imaging agent. During the study, participants will be monitored for diagnostic effectiveness within 15 days after injection. Researchers will assess how well the agent detects lesions and track any side effects or safety concerns. The trial is open to adults aged 18 and older who meet certain disease criteria and consent to participate, with no maximum age limit specified.

Researchers are evaluating the diagnostic effectiveness of 68Ga-PSMA PET scans compared to enhanced CT scans in detecting metastatic lesions in patients with locally advanced and advanced renal cell carcinoma. The study also aims to see if 68Ga-PSMA PET can influence treatment decisions for these patients. This prospective, multicenter trial is sponsored by Xijing Hospital and focuses on improving diagnosis and management for renal cancer with metastases. Participants in the study will receive both a 68Ga-PSMA PET scan and an enhanced CT scan simultaneously to compare their abilities to detect cancer spread. This diagnostic approach helps assess the additional value that 68Ga-PSMA PET may provide over standard CT imaging. The study does not involve any masking or placebo groups and includes only patients who meet specific clinical and imaging criteria. During the study, patients will undergo imaging within six weeks after diagnosis, and researchers will track how the 68Ga-PSMA PET results affect treatment choices. The primary measurement is the additional diagnostic value of the PSMA PET compared to CT over two years. Secondary outcomes include how often the PET scan changes treatment decisions. The study monitors patient safety and adherence, with a planned follow-up period to evaluate outcomes until December 2027.

Researchers are evaluating a new dual-target imaging agent called 68Ga-RM26-RGD for PET/CT scans in patients with breast, brain, and prostate cancers that express specific receptors (GRPR and integrin αvβ3). This study aims to improve tumor detection by comparing this agent with conventional 18F-FDG and single-target imaging agents, addressing limitations of current imaging methods in detecting tumors with low 18F-FDG uptake or variable receptor expression. Participants will undergo PET/CT scans using intravenous injections of 68Ga-RM26-RGD and one of the comparator agents (18F-FDG, 68Ga-RM26, or 68Ga-RGD) within a two-week period. The dosages for these agents are approximately 1.8-2.2 MBq/kg. Each patient receives scans with both agents to compare imaging performance directly. During the study, researchers will assess diagnostic accuracy and dosimetry of 68Ga-RM26-RGD over about one year. Participants will have multiple PET/CT scans and related evaluations to monitor uptake of the imaging agents in tumors. The study includes safety and diagnostic performance monitoring throughout the participation period.

This research aims to evaluate the use of a specialized imaging technique called 68Ga-labeled targeted covalent radiopharmaceutical (TCR) fibroblast activation protein inhibitor (FAPI) PET/CT to guide surgery for medullary thyroid carcinoma (MTC). Surgery is currently the only curative option for MTC, but existing imaging methods and calcitonin tests are not sufficient to fully map the disease. This study focuses on whether 68Ga-TCR-FAPI PET/CT can better identify the extent of MTC and improve surgical planning. Participants are divided into three groups: those newly diagnosed with MTC, those with recurrent or persistent MTC after prior treatment, and those with distant or unresectable lesions but still recommended for surgery. Surgery will be performed based on the lesion range revealed by the 68Ga-TCR-FAPI PET/CT scan, aiming to remove all identified lesions when possible. The surgical principles follow current standards, including lymph node dissection when needed. During the study, researchers will measure calcitonin levels one month after surgery as the primary outcome. Secondary outcomes include two-year event-free survival, how often surgical plans change based on imaging results, and the accuracy of 68Ga-TCR-FAPI PET/CT in detecting MTC lesions. Participants will undergo PET/CT scans, surgery guided by imaging findings, and follow-up assessments to monitor outcomes and safety up to two years after surgery.