Does Frequent X-Ray Exposure Increase Cancer Risk? Understanding Radiation Effects
Will undergoing multiple radiographic examinations in a short period of time have an impact on the body? Hello Doctor, I experienced sudden abdominal discomfort last October, and over the past three months, I have undergone numerous tests, including X-rays, ultrasounds, and CT ...
Dr. Wang Yifen reply Radiology
Hello: Diagnostic X-ray examinations are classified as low-dose radiation imaging. According to the International Commission on Radiological Protection (ICRP) report 103, doses below 100 millisieverts (including single or multiple exposures) do not cause clinical functional impai...[Read More] Does Frequent X-Ray Exposure Increase Cancer Risk? Understanding Radiation Effects
Is My Radiation Exposure Too High? Understanding Safety Standards and Next Steps
Is the radiation excessive? Hello Dr. Wang, I underwent myocardial perfusion imaging in March 2023 and a cardiac catheterization in April 2023 (during which one stent was placed) due to chest discomfort. I had another myocardial perfusion imaging in November 2023 and a subsequent...
Dr. Wang Yifen reply Radiology
Hello, the necessity of X-ray radiation examinations is considered without limiting the radiation dose or the number of examinations. If you are unsure which specialty to consult regarding your symptoms, it is recommended to first make an appointment with a family medicine physic...[Read More] Is My Radiation Exposure Too High? Understanding Safety Standards and Next Steps
Understanding Radiation Exposure: 128-Slice vs. 640-Slice CT Scans
128-slice and 640-slice computed tomography (CT) scans? Hello, Doctor. I would like to inquire about the LDCT (Low-Dose Computed Tomography) chest scan. When using 128-slice and 640-slice CT, does the 640-slice CT emit less radiation than the 128-slice CT? The branch hospital I v...
Dr. Wang Yifen reply Radiology
Hello, the radiation exposure from a single LDCT (Low-Dose Computed Tomography) chest scan is approximately one-fifth that of a conventional CT scan. Both 128-slice and 640-slice CT scanners meet the specifications required by the National Health Administration for low-dose CT lu...[Read More] Understanding Radiation Exposure: 128-Slice vs. 640-Slice CT Scans
Impact of Environmental Radiation Dust on Human Health: A Closer Look
Radiation dust in the environment If artificial radioactive materials are brought into the home environment, particularly in a place where one spends over eight hours a day, such as a bed, can they continuously expose the human body to radiation (for example, cesium-137 which emi...
Dr. Wang Yifen reply Radiology
Hello, the effects of radiation on the human body are related to three factors: distance, time, and shielding. Long-term exposure to radioactive materials can have adverse effects on health. Keeping a safe distance from radiation sources, minimizing the duration of exposure, and ...[Read More] Impact of Environmental Radiation Dust on Human Health: A Closer Look
Is Frequent X-Ray Exposure Safe for Children’s Health?
The child is repeatedly undergoing X-ray examinations? Hello, doctor. I apologize for the interruption, but I would like to ask about my child who frequently gets sick (coughing, nasal congestion, nosebleeds, etc.). Each time we visit the doctor, they request X-rays for my child,...
Dr. Wang Yifen reply Radiology
Hello, the necessity of X-ray examinations is considered without limiting the number of tests or the dosage. Whether an X-ray is necessary is determined by the attending physician based on clinical judgment. Children, due to their developing organs and longer life expectancy, are...[Read More] Is Frequent X-Ray Exposure Safe for Children’s Health?
Is MRI Safe for Eyes with Unknown Metal Foreign Bodies?
Magnetic Resonance Imaging (MRI) Hello, doctor. If small metal particles accidentally enter the eye and I undergo an MRI, could the eye be injured?
Dr. Wang Yifen reply Radiology
Hello, the presence of a metallic foreign body in the orbit is a contraindication for Magnetic Resonance Imaging (MRI), as one cannot enter the high magnetic field environment of an MRI. The high magnetic field may cause the metal to move, resulting in injury. Regarding MRI imagi...[Read More] Is MRI Safe for Eyes with Unknown Metal Foreign Bodies?
Does G-Motion Chair Electromagnetic Waves Affect Brain Tumor Recurrence?
Does the electromagnetic radiation from G chairs have an impact on brain tumors? Hello Doctor, I was diagnosed with a grade II glioma in 2022, underwent surgical resection in June of the same year, and received 20 sessions of proton therapy at Chang Gung Memorial Hospital. I am c...
Dr. Wang Yifen reply Radiology
Hello, electromagnetic waves are a type of "non-ionizing radiation" and do not pose the risks associated with ionizing radiation. Regarding the benefits and risks of the treatment provided by this product, it is advisable to disclose your medical history and discuss it ...[Read More] Does G-Motion Chair Electromagnetic Waves Affect Brain Tumor Recurrence?
Understanding Radiation Exposure and Its Impact on Blood Health
After undergoing a CT scan and X-ray, a blood test revealed abnormalities in the blood cells? Hello Doctor: Due to hematuria, a urologist performed several X-rays and one abdominal CT scan with contrast from March to December 2022. I noticed that the radiation dose recorded in th...
Dr. Wang Yifen reply Radiology
Hello, the American Association of Physicists in Medicine issued a public statement in 2011 stating that if a single "radiological examination" has a radiation dose of less than 50 millisieverts, and multiple "radiological examinations" are performed within a ...[Read More] Understanding Radiation Exposure and Its Impact on Blood Health
Is Excessive Radiation Exposure a Concern with Multiple CT Scans?
Will the radiation dose from continuous CT scans exceed safe limits? Hello, doctor. My father was involved in a car accident on December 4th and was taken to the emergency room at Taipei Hospital. He sustained an injury to his leg but did not hit his head. However, the doctor ord...
Dr. Wang Yifen reply Radiology
Hello, diagnostic X-ray examinations are classified as low-dose radiation imaging. According to the International Commission on Radiological Protection (ICRP) report 103, doses below 100 millisieverts (including single or multiple exposures) do not cause clinical functional damag...[Read More] Is Excessive Radiation Exposure a Concern with Multiple CT Scans?
Can Abdominal CT Scans Detect Breast Implants? Tips for Privacy
Can a CT scan of the abdomen detect breast implants? Hello, doctor. If I undergo a CT scan with and without contrast for the abdomen and pelvis, will the scan detect my breast implant, which contains a microchip? If it can be detected, how can I avoid this or communicate with the...
Dr. Wang Yifen reply Radiology
Hello, 1. The breast and abdominal organs overlap at the level of the diaphragm, making it unavoidable for the breast to be included in the imaging during positioning scans. The transverse section scan of the abdomen will overlap with part of the breast, while the pelvic cavity...[Read More] Can Abdominal CT Scans Detect Breast Implants? Tips for Privacy
Understanding Radiation Dose in Chest CT Scans: A Comprehensive Guide
Radiation Dose Issues Hello, doctor. I would like to ask about the radiation doses for the following three types of chest CT scans: 1. Low-dose chest CT, 2. Standard chest CT without contrast, and 3. Chest CT with contrast. What are the approximate radiation doses in millisievert...
Dr. Wang Yifen reply Radiology
Hello, the radiation dose may vary slightly depending on the subject's body size, the scanning area, and the exposure time. According to the International Commission on Radiological Protection (ICRP) report 103, doses below 100 millisieverts (including single or multiple exp...[Read More] Understanding Radiation Dose in Chest CT Scans: A Comprehensive Guide
Radiation Therapy for Keloids: Safety Concerns and Treatment Insights
Radiation therapy for keloids? Hello, doctor. My family member has keloids on the chest and back. If surgery is performed for removal, it must be accompanied by radiation therapy to reduce recurrence. I have a few questions: Q1: Since my family member is planning to get married...
Dr. Wang Yifen reply Radiology
Hello, regarding the radiation therapy for keloids, Dr. Song Shiyu from the Department of Radiation Oncology at Changhua Hospital provided the following responses: 1. After external beam radiation therapy, there will be no residual radiation in the patient's body, and they...[Read More] Radiation Therapy for Keloids: Safety Concerns and Treatment Insights
Concerns About Radiation Exposure from Cervical and Lumbar X-rays
X-rays of the cervical and lumbar spine were taken in a short period of time? Hello, doctor. I apologize for the interruption. Recently, I have been experiencing tremors in my hands and feet (starting with my right hand, then my left hand, and then both thighs... a progressive tr...
Dr. Wang Yifen reply Radiology
Hello, the radiation exposure from diagnostic X-rays is considered low dose radiation. The X-ray examinations you described fall within a safe radiation dose, so please do not worry too much. Regarding the symptoms you mentioned, such as "dizziness, nausea, and dry eyes,&quo...[Read More] Concerns About Radiation Exposure from Cervical and Lumbar X-rays
Is My Radiation Exposure Too High? Understanding Safe Levels for 2022 and 2023
Radiation Issues Hello Doctor, in the year 2022, I accumulated a total of 20.828 millisieverts (as seen in the National Health Insurance Easy Access app), which includes many ultrasounds and X-rays. The 20.828 millisieverts only accounts for the examinations performed by doctors ...
Dr. Wang Yifen reply Radiology
Hello, ultrasound is a non-radiative examination and does not involve any radiation dose. Diagnostic X-rays and nuclear medicine dopamine brain scans are considered low-dose radiation examinations, which are reported to be safe according to the literature. When it comes to X-ray ...[Read More] Is My Radiation Exposure Too High? Understanding Safe Levels for 2022 and 2023
Radiation Exposure Concerns for One-Year-Old After Multiple X-Rays
Radiation concerns regarding multiple X-rays in a one-year-old infant? Hello, my child has just turned one year old and underwent an X-ray for a hip joint examination. However, the child was too small to cooperate, resulting in six to seven consecutive X-ray exposures without any...
Dr. Wang Yifen reply Radiology
According to the American Society of Radiologic Technologists, the radiation dose for a single hip X-ray in adults is approximately 0.7 millisieverts. The International Commission on Radiological Protection (ICRP) report 103 states that doses below 100 millisieverts (including si...[Read More] Radiation Exposure Concerns for One-Year-Old After Multiple X-Rays
Understanding Pregnancy Timing After Contrast MRI: Key Insights
Pregnancy issues Hello Doctor, I had my period from September 11 to 15, underwent an MRI with contrast on September 20, ovulated on September 22, and took a pregnancy test on October 5 which showed two lines. I would like to ask if I conceived before the contrast injection or aft...
Dr. Wang Yifen reply Radiology
Hello, if the timing you described is correct, under normal physiological mechanisms, conception would occur after ovulation on September 22. Regarding precautions after pregnancy, it is advisable to visit an obstetrician-gynecologist for specialized consultation. Please take thi...[Read More] Understanding Pregnancy Timing After Contrast MRI: Key Insights
Understanding Radiation Dose in Long-Term Angiography for Basilar Aneurysm Monitoring
Inquiry about radiation dose in angiography? I have been undergoing angiography every three years for over ten years due to a "basilar artery aneurysm." The reports indicate that the imaging includes "carotid angiography (bilateral)" and "vertebral artery...
Dr. Wang Yifen reply Radiology
Hello, angiography is divided into "digital X-ray angiography," "computed tomography angiography," and "magnetic resonance angiography." According to the American Society of Radiologic Technologists, the radiation dose for a head and neck X-ray angio...[Read More] Understanding Radiation Dose in Long-Term Angiography for Basilar Aneurysm Monitoring
Understanding the Impact of Cumulative Radiation Exposure from X-rays and CT Scans
Is the impact of radiation accumulation significant? Hello, doctor. I had chest X-rays in July, August, and on September 20th, and no issues were found. Since the cause of my chest pain and tightness remains unclear, I am now planning to undergo a low-dose computed tomography (CT...
Dr. Wang Yifen reply Radiology
Hello, a chest X-ray has a radiation dose of approximately 0.02 millisieverts, while a single low-dose computed tomography (CT) scan has a radiation dose of about 2 millisieverts. According to the International Commission on Radiological Protection (ICRP) report 103, doses below ...[Read More] Understanding the Impact of Cumulative Radiation Exposure from X-rays and CT Scans
Low-Dose Lung CT: Safety Concerns for Patients with Liver Cirrhosis
Low-dose computed tomography of the lungs? Hello Doctor, my father is turning 50 today and has a history of liver cirrhosis. Due to his occupation, I am planning to take him for a low-dose lung CT scan, but I have some questions: 1. Will the radiation exposure from the low-dose l...
Dr. Wang Yifen reply Radiology
Hello, near the diaphragm, parts of the lungs and liver may fall within the scanning range of the machine, and radiation may affect the liver. The radiation dose from a low-dose chest computed tomography (CT) scan is approximately 2 millisieverts. According to the International C...[Read More] Low-Dose Lung CT: Safety Concerns for Patients with Liver Cirrhosis
Impact of Improper Breathing During Abdominal CT Scan on Image Quality
Abdominal Computed Tomography (CT) Scan Hello, doctor. I recently underwent an abdominal CT scan, but I didn't take a deep breath as instructed and just held my breath. Will this affect the interpretation of the images? Thank you for your response.
Dr. Wang Yifen reply Radiology
Hello, it should not be an issue. If there is an impact on the interpretation, the testing facility will notify you to retake the examination. If you are not asked to retake it, it means there is no impact. Please take this into consideration, and I wish you peace and good health...[Read More] Impact of Improper Breathing During Abdominal CT Scan on Image Quality