CT vs MRI: Which is Better for Small Intestine Evaluation?
Computed Tomography (CT) scan Hello, Director Wang. Due to a long-term (one year) recurring diarrhea issue, I would like to pay for an examination (I have already undergone gastroscopy, colonoscopy, and an upper abdominal MRI). I would like to ask the doctor whether I should choo...
Dr. Wang Yifen Reply:
Hello, imaging studies of the small intestine can include small bowel X-rays or computed tomography (CT) scans. Magnetic resonance imaging (MRI) does not involve radiation but has a longer examination time and is significantly affected by small bowel peristalsis, making it less s...[Read More] CT vs MRI: Which is Better for Small Intestine Evaluation?
Understanding CT Scan Radiation: Safety Concerns and Accumulation Risks
Computed Tomography (CT) Radiation Hello, doctor. 1. I would like to ask if the radiation exposure from a computed tomography (CT) scan accumulates in the body. I am scheduled to undergo a head CT scan soon (which requires contrast agent). 2. I had an abdominal CT scan last O...
Dr. Wang Yifen Reply:
Hello, radiation is a form of energy that results in exposure during examinations, but it does not accumulate in the human body after the procedure. It is similar to how sunlight does not accumulate in the body after sun exposure. It is important to be aware of the effects of rad...[Read More] Understanding CT Scan Radiation: Safety Concerns and Accumulation Risks
Understanding Changes in Lung Nodules: CT Scan Report Inquiry
Inquiry about CT report? On June 20, I had a chest CT that revealed a 5mm solid nodule at the right middle lobe (RML) (SE3 IM196). Subsequently, on September 29, I had a follow-up at the same hospital, and the results were as follows: Airway/lungs/pleura: two 5mm solid nodules at...
Dr. Wang Yifen Reply:
1. The patient lies on the examination table, and the scanning position of the equipment may vary relative to the patient's position on the table; it is not fixed for every examination. The marked location indicates the relative position of the images generated by the scan d...[Read More] Understanding Changes in Lung Nodules: CT Scan Report Inquiry
Understanding CT Scan Results: Hemangioma vs. Focal Nodular Hyperplasia
Computed Tomography (CT) Scan 1. The statement starting with "although" indicates that the differentiation between hemangioma and focal nodular hyperplasia is challenging due to the limitations of the CT scan performed, which was not conducted according to the dynamic l...
Dr. Wang Yifen Reply:
Hello: 1. I believe the meaning of this English report is that the imaging after the administration of contrast agent is more likely indicative of a hepatic hemangioma or focal nodular hyperplasia. However, further differentiation is challenging because the CT scan was not perf...[Read More] Understanding CT Scan Results: Hemangioma vs. Focal Nodular Hyperplasia
Understanding Potential Metastasis in Testicular Cancer: CT Scan Insights
Suspected metastasis of testicular cancer? Hello: I have testicular cancer and recently suspected a recurrence, so I underwent a whole-body CT scan. Here are the report details from my health record: Chest CT: Multiple tiny peribronchial nodules and mild subsegmental atelectasis ...
Dr. Wang Yifen Reply:
Hello, 1. The health insurance report is uploaded by the hospital to a dedicated website for the National Health Insurance Administration, providing reference for the public. To my understanding, hospitals can only upload the report once. If a physician later reviews the images...[Read More] Understanding Potential Metastasis in Testicular Cancer: CT Scan Insights
Can Cardiac CT and Low-Dose Lung CT Be Done Together?
Cardiac CT with low dose? I have high cholesterol and experience palpitations after exercise. I am planning to undergo a cardiac CT scan. However, I previously had a low-dose lung CT that revealed three pulmonary nodules measuring 0.3, 0.5, and 0.6 cm, which need to be monitored ...
Dr. Wang Yifen Reply:
Hello, both of these examinations are performed using computed tomography (CT) scanners, but they serve different purposes, and the scanning range and parameters are also different. Cardiac CT is used to assess whether there is stenosis in the coronary arteries and requires the i...[Read More] Can Cardiac CT and Low-Dose Lung CT Be Done Together?
Understanding CT Scan Results: Esophagus, Heart, and Breast Nodules Explained
Computed Tomography (CT) Scan 1. In the previous computed tomography (CT) scan report, there is a statement that "The esophagus and heart are grossly unremarkable." This means that there are no significant abnormalities detected in the esophagus and heart on the scan. I...
Dr. Wang Yifen Reply:
Hello, 1. The esophagus and heart are grossly unremarkable, meaning that there are no significant imaging findings worth describing for these structures. 2. Enhancing nodules refer to nodules that show contrast enhancement after the administration of a contrast agent. Breast ...[Read More] Understanding CT Scan Results: Esophagus, Heart, and Breast Nodules Explained
Understanding CT Scans: Radiation Exposure and Image Quality Concerns
Computed Tomography (CT) scan Hello Doctor, last November I underwent an abdominal CT scan at a small hospital in Yilan due to diarrhea and abdominal pain. Since my condition did not improve, I found out that the CT scan was performed with 4 slices. I would like to ask the doctor...
Dr. Ye Weicheng Reply:
Dear Mr. A-Zhen, Regarding your questions about computed tomography (CT) scans, let me explain: 1. Is a 4-slice CT scan performed in multiple passes for the abdomen, and does the radiation dose increase? Answer: Generally, the range of a CT scan is determined by the radiologic...[Read More] Understanding CT Scans: Radiation Exposure and Image Quality Concerns
Concerns About Abdominal CT Scan: Breathing Techniques and Metal Implants
Abdominal Computed Tomography (CT) Scan During my abdominal CT scan, the machine instructed me to take a deep breath and hold it. After the scan, I was told I could breathe again, but I was so nervous that I realized later at home that I hadn't fully inhaled each time I held...
Dr. Wang Yifen Reply:
Hello, holding your breath during the examination can reduce the interference caused by respiratory motion artifacts, and it has minimal impact on abdominal organs, as peristalsis in the gastrointestinal tract does not stop due to breath-holding. The oral cavity and abdomen are c...[Read More] Concerns About Abdominal CT Scan: Breathing Techniques and Metal Implants
CT 640 vs DSCT: Which Offers Better Accuracy and Lower Radiation?
Which is more accurate, CT 640 or DSCT? I would like to arrange a detailed health check for my father. Which is more accurate, the CT 640 ultra-fast computed tomography scan or the dual-source computed tomography (DSCT)? Additionally, which one has a lower radiation dose? If ther...
Dr. Wang Yifen Reply:
Hello, 1. To enhance the quality of radiation medicine and ensure public health and safety, the Atomic Energy Council of the Executive Yuan has actively promoted quality assurance operations for medical exposure since 2004. For 11 types of radiological diagnostic equipment freq...[Read More] CT 640 vs DSCT: Which Offers Better Accuracy and Lower Radiation?
Understanding Radiation Exposure: Safety Concerns and Dental X-rays
Radiation issues Hello, doctor. I have undergone one abdominal CT scan without contrast, approximately five abdominal X-rays, four chest X-rays, ten single panoramic X-rays, and three full-mouth X-rays. However, my teeth still feel a bit uncomfortable, and I'm unsure if I ca...
Dr. Wang Yifen Reply:
Hello, the decision to perform a radiological examination is based on the physician's professional judgment regarding the necessity of the examination, adhering to the principles of medical justification and optimization of exposure. There are no restrictions on the number o...[Read More] Understanding Radiation Exposure: Safety Concerns and Dental X-rays
Understanding CT Scan Quality: Is 4-Slice Technology Adequate?
CT scan interpretation Hello doctor, last November I went to a small hospital in Yilan for an abdominal CT scan due to abdominal discomfort. The results were normal, but my symptoms have not improved. I later found out that the CT scan from that hospital was a 4-slice scan. I wou...
Dr. Wang Yifen Reply:
To enhance the quality of radiation medicine and ensure public health and safety, the Atomic Energy Council of the Executive Yuan has actively promoted quality assurance for medical exposure since 2004. For 11 commonly used radiological diagnostic devices, such as computed tomogr...[Read More] Understanding CT Scan Quality: Is 4-Slice Technology Adequate?
Understanding Spinal Fractures and the Impact of Frequent X-rays
Vertebral fracture and mild spondylolisthesis? Hello! I was diagnosed with a vertebral arch fracture and mild spondylolisthesis in early January. Since then, I have visited several clinics and have had multiple X-rays of my spine and vertebral arch. In early March, I started shoc...
Dr. Wang Yifen Reply:
Hello, the application of radiation in medicine is very extensive. It is utilized in radiological diagnostics, radiation therapy, nuclear medicine, surgical localization in operating rooms, dental procedures, and lithotripsy in urology, among others. When performed by qualified p...[Read More] Understanding Spinal Fractures and the Impact of Frequent X-rays
Understanding Radiation Risks of Full-Body CT Scans: What You Need to Know
Computed Tomography Radiation Hello, doctor. Thank you for your previous response, but I still have some concerns that I would like to further inquire about: 1. Is a whole-body CT scan considered a high or excessive radiation dose examination? Is it not suitable for generally hea...
Dr. Wang Yifen Reply:
Hello, diagnostic computed tomography (CT) scans are considered low-dose radiation examinations. Whether this method is suitable for an individual should be assessed by a clinical physician. A single whole-body CT scan does not cause functional damage to the body. If you experien...[Read More] Understanding Radiation Risks of Full-Body CT Scans: What You Need to Know
Understanding CT Scan Radiation Exposure and Cancer Risk Concerns
Computed Tomography Radiation Hello, I would like to consult with a physician: I underwent a non-contrast abdominal and pelvic CT scan in the emergency room on October 24 last year, and on March 8 this year, I had a full-body CT scan (from the neck to the pelvis, with contrast). ...
Dr. Wang Yifen Reply:
According to the American Society of Radiologic Technologists, the radiation dose from a single abdominal and pelvic CT scan is approximately 14 millisieverts, while a full-body CT scan has a radiation dose of about 21 millisieverts. The total radiation dose amounts to approximat...[Read More] Understanding CT Scan Radiation Exposure and Cancer Risk Concerns
Understanding Radiation Risks: Are CT Scans and X-rays Overused?
Radiological examination Hello, doctor. About a year ago, I went to the hospital outpatient department due to severe lower back pain and urinary discomfort. After an ultrasound, the doctor found some cysts on my left kidney and, for safety reasons, arranged for a CT scan of the k...
Dr. Wang Yifen Reply:
Hello, abdominal computed tomography (CT) plays a crucial role in the diagnosis of acute abdominal pain. Certain conditions necessitate the assessment of intra-abdominal diseases to determine the need for surgical intervention. Physicians evaluate clinical symptoms to decide whet...[Read More] Understanding Radiation Risks: Are CT Scans and X-rays Overused?
CT Scans with BARD PowerPort: Safety and Guidelines for Contrast Injection
Computed Tomography - BARD PowerPort Hello Dr. Wang, I would like to inquire about the use of a BARD PowerPort during a computed tomography (CT) scan when injecting contrast agents. The patient guide provided states that high-pressure injection of contrast agents is permissible w...
Dr. Wang Yifen Reply:
Hello, 1. According to Ms. Wang, a sales representative from BD Company, the POWERPORT implanted injection port can be used in conjunction with the SAFESTEP (safety non-coring needle) for percutaneous access to the port for treatments such as chemotherapy and drug infusion. If ...[Read More] CT Scans with BARD PowerPort: Safety and Guidelines for Contrast Injection
Can CT Scans Detect Tumors in the Retro-Duodenal Area?
There is a long tumor at the posterior end of the duodenum? I would like to ask if, in addition to enteroscopy, a CT scan can help determine the presence of a tumor at the posterior part of the duodenum?
Dr. Wang Yifen Reply:
Hello, a computed tomography (CT) scan may not necessarily reveal the presence of a tumor at the posterior end of the duodenum. CT is a non-invasive imaging technique, and its diagnostic accuracy can be influenced by the nature of the lesion (location, size, tumor characteristics...[Read More] Can CT Scans Detect Tumors in the Retro-Duodenal Area?
Can CT Scans Detect Tumors in the Duodenum?
There is a long tumor at the posterior end of the duodenum? I would like to ask if, in addition to enteroscopy, a CT scan can help determine the presence of a tumor at the posterior end of the duodenum?
Dr. Wang Yifen Reply:
Hello, a computed tomography (CT) scan may not necessarily reveal whether there is a tumor at the posterior end of the duodenum. CT is a non-invasive examination, and its diagnostic accuracy can be influenced by the nature of the lesion (location, size, tumor characteristics), th...[Read More] Can CT Scans Detect Tumors in the Duodenum?
Understanding CT Scans for Abdominal Discomfort: What You Need to Know
Questions about Computed Tomography (CT) Scans? I would like to ask about my discomfort in the upper right abdomen that has persisted for the past couple of months. I have undergone ultrasound, gastroscopy, and colonoscopy, and aside from gastroesophageal reflux and mild gastriti...
Dr. Wang Yifen Reply:
Hello, when arranging advanced imaging health examinations, it is recommended to consider the patient's medical history and the purpose of the examination. For lung cancer screening, the best method currently is low-dose computed tomography (LDCT) of the lungs. For the gastr...[Read More] Understanding CT Scans for Abdominal Discomfort: What You Need to Know