Does Dental X-Ray Radiation Cause Hair Follicle Damage?
X-ray radiation issues? I had a panoramic X-ray and a lateral cephalometric X-ray a few days ago. Will this cause damage to the hair follicles, leading to eyelash or hair loss?
Dr. Wang Yifen reply Radiology
Hello, according to the reference materials from the American Society of Radiologic Technologists, the radiation dose from a single full-mouth X-ray for adults is approximately 0.01 millisieverts, while the radiation dose from an adult cranial X-ray is about 0.1 millisieverts. Th...[Read More] Does Dental X-Ray Radiation Cause Hair Follicle Damage?
Understanding Contrast Agents in CT Scans: When Are They Necessary?
Regarding contrast agents? Hello, doctor. I went to see a neurologist due to headaches, and they arranged a CT scan for me without the use of contrast dye. I would like to ask: 1. Since I have previously had a CT scan with contrast dye, I am concerned that not using contrast this...
Dr. Wang Yifen reply Radiology
Hello, regardless of whether the patient receives contrast agent for the computed tomography (CT) scan, the same CT equipment is used for the examination. Therefore, the decision to administer contrast is not influenced by the equipment. The assessment of whether to use contrast ...[Read More] Understanding Contrast Agents in CT Scans: When Are They Necessary?
Understanding X-Ray Risks for Infants: What Parents Should Know
X-ray exposure in infants and young children? A 9-month-old child was taken to the emergency department due to vomiting and crying, where a chest and abdominal X-ray was performed. During a follow-up with a pediatrician, the doctor mentioned that such a young child should not hav...
Dr. Wang Yifen reply Radiology
Hello, the radiation dose from an abdominal X-ray for adults is approximately 0.7 millisieverts. Since children's body sizes are smaller than adults, the radiation dose they receive is lower than the average dose for adults. The radiation dose from a single abdominal X-ray i...[Read More] Understanding X-Ray Risks for Infants: What Parents Should Know
Understanding Radiation Exposure from Multiple CT Scans: What You Need to Know
Radiation Dose from Computed Tomography (CT) Scans Hello Doctor, I am 28 years old. Due to my poor health over the past few years, I have undergone several abdominal CT scans this year, all of which were arranged by my doctor. However, I am very scared about the risk of radiation...
Dr. Wang Yifen reply Radiology
According to information from the National Health Service, both men and women have approximately a 40% risk of being diagnosed with cancer at some point in their lives. The vast majority of cases are caused by aging and long-term exposure to risk factors such as tobacco, alcohol,...[Read More] Understanding Radiation Exposure from Multiple CT Scans: What You Need to Know
Understanding CT Scan Radiation: Safety and Accumulation Concerns
Computed Tomography (CT) radiation? Hello, doctor. 1. I would like to ask if the radiation exposure from a CT scan accumulates in the body. I am scheduled for a head CT scan soon (which requires contrast media). 2. I had an abdominal CT scan last October (also with contrast m...
Dr. Wang Yifen reply Radiology
Hello, radiation is a form of energy that causes exposure during examinations, but it does not accumulate in the human body afterward. 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 radiation on the ...[Read More] Understanding CT Scan Radiation: Safety and Accumulation Concerns
Understanding CT Scan Radiation: Safety Concerns and Accumulation Explained
Computed Tomography (CT) Radiation Hello, doctor. 1. I would like to ask if the radiation exposure from a CT scan accumulates in the body. I am scheduled for a head CT scan soon (which requires contrast dye). 2. I had an abdominal CT scan last October (also with contrast dye)...
Dr. Wang Yifen reply Radiology
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. This is similar to how sunlight does not accumulate in the body after sun exposure. It is important to be aware of the effects of r...[Read More] Understanding CT Scan Radiation: Safety Concerns and Accumulation Explained
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 Radiology
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 Radiology
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 Radiation in Water-Soluble Contrast Agents and Barium
Water-soluble contrast agents or barium agents? Hello, I recently need to undergo an upper gastrointestinal barium study due to personal health reasons. I searched for information online, but I couldn't find out whether the water-soluble contrast agents and barium excreted f...
Dr. Wang Yifen reply Radiology
Hello: In upper gastrointestinal imaging, the radiation comes from the X-ray machine used for the examination. Radiation is present only when the medical personnel operate the machine to generate X-ray energy for imaging. The contrast agents used in the examination, whether water...[Read More] Understanding Radiation in Water-Soluble Contrast Agents and Barium
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 Radiology
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 MRI's Role in Detecting Colorectal Cancer Stages
Colorectal cancer MRI Doctor, I had a full-body MRI last year, and recently I've been having gastrointestinal issues, feeling the urge to use the restroom frequently. I have a family history of colorectal cancer, and I'm really worried it might be colorectal cancer. 1...
Dr. Wang Yifen reply Radiology
Hello, regarding colorectal cancer screening, the National Health Administration provides free fecal occult blood tests every two years for individuals aged 50 and older. If the fecal occult blood test is positive, the next diagnostic tool is a colonoscopy. Abdominal computed tom...[Read More] Understanding MRI's Role in Detecting Colorectal Cancer Stages
Understanding White Spots on Mammograms: Should You Worry About Breast Cancer?
Breast white spots Doctor, my wife previously had a mammogram at the hospital, and they informed us that there are white spots that require further magnification imaging. I would like to know if this increases the likelihood of breast cancer.
Dr. Wang Yifen reply Radiology
Hello, the white spots seen in mammography may be calcifications. Most breast calcifications are benign, but they can also be indicative of breast cancer, so further magnification and evaluation are necessary. For more information regarding breast calcifications, you can refer to...[Read More] Understanding White Spots on Mammograms: Should You Worry About Breast Cancer?
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 Radiology
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 Radiology
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
Is Frequent X-Ray Exposure for Kidney Stones Safe? Understanding Risks and Recommendations
X-ray of the lumbar region for kidney stones? Hello, I have been experiencing kidney stone pain since mid-May. I had an X-ray on May 11, and when I went to the lithotripsy center on May 16, they said they would take another X-ray to confirm the location, which was done on the lit...
Dr. Wang Yifen reply Radiology
According to the American Society of Radiologic Technologists, the radiation dose from a single abdominal X-ray is approximately 0.7 millisieverts. The International Commission on Radiological Protection (ICRP) report 103 states that doses below 100 millisieverts (including singl...[Read More] Is Frequent X-Ray Exposure for Kidney Stones Safe? Understanding Risks and Recommendations
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 Radiology
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 Multicentric Tumors in Breast Cancer: A Radiology Perspective
Computed Tomography (CT) Scan Could you please clarify with Dr. Wang? You mentioned that multicentric tumors refer to multicentric tumors. Is this related to breast cancer?
Dr. Wang Yifen reply Radiology
Hello, tumors include both benign and malignant types, and the term "multicentric tumor" does not necessarily indicate breast cancer (malignant). Please take this into consideration, and I wish you peace and health.[Read More] Understanding Multicentric Tumors in Breast Cancer: A Radiology Perspective
Understanding CT Imaging of Enhancing Nodules in Breast Radiology
Computed Tomography Interpretation Thank you, Dr. Wang, for your previous explanation regarding enhancing nodules in the breast! 1. As you mentioned, enhancing nodules on CT can represent both benign and malignant tumors, so further evaluation is necessary. In your experience, ...
Dr. Wang Yifen reply Radiology
Hello, 1. Most enhancing nodules are benign. However, imaging studies cannot replace microscopic examination of pathological tissue. If clinically deemed necessary, a biopsy should be performed to obtain specimens to determine whether the nodules are benign or malignant. The tiss...[Read More] Understanding CT Imaging of Enhancing Nodules in Breast Radiology
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 Radiology
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 X-Ray Radiation Exposure: What You Need to Know
X-ray radiation issues? The radiation dose for a single cervical X-ray is approximately 0.2 millisieverts (mSv). However, the total radiation exposure can vary based on the specific type of imaging performed and the number of views taken. In your case, if you have undergone cer...
Dr. Wang Yifen reply Radiology
Hello, there are many factors that can affect the dose of radiation exposure, including the area of exposure, the range of exposure, the distance from the source, and the duration of exposure. The body size of the individual being examined can also influence the radiation dose. A...[Read More] Understanding X-Ray Radiation Exposure: What You Need to Know