Is a Standard Abdominal MRI Enough to Check for Pancreatic Issues?
Magnetic Resonance Imaging (MRI) of the pancreas? Hello Dr. Wang, I would like to ask if a general abdominal MRI is sufficient to check for any abnormalities in the pancreas during a health examination (without needing to differentiate between benign and malignant tumors), or i...
Dr. Wang Yifen Reply:
Hello, the injection of contrast agents (contrast media) can enhance the detection and assessment of diseases. It is also possible to choose not to administer a contrast agent; however, for specific conditions, especially tumors, this may reduce the diagnostic value and accuracy ...[Read More] Is a Standard Abdominal MRI Enough to Check for Pancreatic Issues?
Understanding Radiation Risks from Chest CT Scans and Cancer Concerns
Chest Computed Tomography Radiation Hello, I had a low-dose chest CT scan during my health check-up in early May this year due to a lung nodule. My doctor has scheduled another chest CT scan with contrast for follow-up at the end of December, which will not be low-dose. Additiona...
Dr. Wang Yifen Reply:
Hello, 1. According to the data from the American Society of Radiologic Technologists, the risk of developing additional cancer from a single low-dose chest CT scan is 0.010114%, while the risk from a standard chest CT scan is 0.035398%. The combined radiation dose from both sc...[Read More] Understanding Radiation Risks from Chest CT Scans and Cancer Concerns
Understanding Radiation Dose and Distance in Dental X-rays: Key Concerns
Questions about radiation dose and distance? I have read articles on E-net regarding similar issues, but the answers did not alleviate my concerns, so I am asking again to see if there are clearer answers. I have seen articles elsewhere mentioning that radiation dose is related t...
Dr. Wang Yifen Reply:
Hello: 1. Regarding the placement of X-rays in a full-mouth X-ray machine: X-rays are produced when the X-ray tube is energized, releasing energy that is converted into X-rays due to the high-voltage electric field. Therefore, X-rays are emitted from the X-ray tube of the machi...[Read More] Understanding Radiation Dose and Distance in Dental X-rays: Key Concerns
Understanding Radiation Exposure from Frequent X-rays and CT Scans
I have health anxiety, so I had many X-rays taken this year, raising concerns about radiation exposure? I have health anxiety, so I often worry that I have something harmful in my body. Due to concerns about radiation causing cancer, I would like a doctor to evaluate whether my e...
Dr. Wang Yifen Reply:
Hello, regarding the estimation of radiation doses and risks, you can refer to the American Society of Radiologic Technologists website at http://www.xrayrisk.com/calculator/calculator.php. According to the data from that site, the radiation dose for a head and neck CT scan is ap...[Read More] Understanding Radiation Exposure from Frequent X-rays and CT Scans
Understanding Radiation Exposure: Risks and Safety Tips After CT Scans
Questions regarding radiation? In June of this year, I had an accident and since then I have undergone a total body CT scan once, a head CT scan twice (one with fine cuts), seven X-rays of the head (from different angles), and ten X-rays of the shoulder (from different angles). D...
Dr. Wang Yifen Reply:
Hello, the "radiation" produced by X-ray machines is a form of energy that penetrates objects to create images of them. For example, sunlight is a type of energy that does not accumulate, and similarly, the radiation from X-ray machines does not accumulate in the body, ...[Read More] Understanding Radiation Exposure: Risks and Safety Tips After CT Scans
Understanding the Health Risks of Multiple X-Ray Exposures
Issues Related to Radiation Exposure from X-rays Hello Doctor, I would like to ask if the cumulative radiation from the five X-rays I had in the past two years—two lumbar X-rays in March and April of last year, a chest X-ray in January this year due to a work-related strain, anot...
Dr. Wang Yifen Reply:
Hello, Ms. Gao: According to the information from the American Society of Radiologic Technologists, the radiation dose for a lumbar X-ray is approximately 1.5 millisieverts, for a chest X-ray (both frontal and lateral views) it is about 0.1 millisieverts, and for a full-mouth den...[Read More] Understanding the Health Risks of Multiple X-Ray Exposures
Understanding Radiation Exposure from Multiple X-rays and CT Scans: Risks and Insights
Radiation issues Hello Dr. Wang: This year, I went to a clinic for X-rays due to lower back pain, and they told me I have scoliosis. I then went to Asia University Hospital and had two more X-rays to check for scoliosis, totaling three spinal X-rays (two images taken at different...
Dr. Wang Yifen Reply:
Hello Mr. Huang: The spine can be divided into the cervical, thoracic, lumbar, and sacral regions. According to the website supported by the American Registry of Radiologic Technologists, the radiation dose from a head CT scan is approximately 2 millisieverts, two chest X-rays ar...[Read More] Understanding Radiation Exposure from Multiple X-rays and CT Scans: Risks and Insights
CT Scans in Infants: Understanding Radiation Risks and Concerns
Pediatric Computed Tomography (CT) Scan Hello, doctor. My baby is five months old and fell from the bed. The doctor performed a full-body CT scan, and the brain received about 2 millisieverts, while the body received about 9 millisieverts. Will this increase the risk of developin...
Dr. Wang Yifen Reply:
Hello, computed tomography (CT) scans can assist physicians in quickly diagnosing acute conditions such as intracranial hemorrhage, pneumothorax, visceral bleeding, or fractures in trauma patients, allowing for timely and appropriate interventions. This has advantages for clinica...[Read More] CT Scans in Infants: Understanding Radiation Risks and Concerns
Should You Worry About Radiation Exposure from Recent Medical Imaging?
Radiation Issues Hello: In January of this year, I had a CT scan of my head due to stones found during a tonsil examination. In April, I had a dental X-ray of my front teeth (not a full mouth series). Should I be concerned about the radiation exposure from these procedures? I had...
Dr. Wang Yifen Reply:
According to the website supported by the American Society of Radiologic Technologists, the radiation dose from a single head CT scan is approximately 2 millisieverts (mSv), while a single dental X-ray has a radiation dose of about 0.005 mSv. Therefore, the total radiation dose f...[Read More] Should You Worry About Radiation Exposure from Recent Medical Imaging?
Concerns About Radiation Exposure from X-rays in Infants
Concerns about radiation exposure from X-rays in infants? Hello Dr. Wang: My baby is 4 and a half months old and needs to have a bone age assessment due to some tests. During the procedure, my baby had difficulty controlling their hand, so we ended up taking 6 consecutive X-rays ...
Dr. Wang Yifen Reply:
The radiation dose from six X-rays of the limbs is approximately 0.006 millisieverts. According to the International Commission on Radiological Protection (ICRP) report 103, doses below 100 millisieverts (whether received in a single exposure or multiple exposures) are not expect...[Read More] Concerns About Radiation Exposure from X-rays in Infants
Understanding Bilateral Lower Lung Nodules: Next Steps After X-Ray Findings
Bilateral lower lung nodular shadows? In the health check report, the chest X-ray examination shows bilateral lower lung nodular shadows. Should further examination be conducted?
Dr. Wang Yifen Reply:
Bilateral lower lung nodular shadows are noted. It is recommended to visit the pulmonary medicine outpatient clinic for evaluation by a physician to determine whether additional X-ray imaging of the nodules is necessary, or to arrange for other examinations such as a low-dose com...[Read More] Understanding Bilateral Lower Lung Nodules: Next Steps After X-Ray Findings
Impact of X-rays on Fertility Treatments: What You Need to Know
X-ray issues Hello, I am currently undergoing infertility treatment, which requires regular administration of ovulation injections and medication. My company recently scheduled a health check that includes an X-ray. I asked my doctor, and they advised against it. I would like to ...
Dr. Wang Yifen Reply:
Please discuss the risks and benefits of the X-ray examination with your physician before deciding whether to proceed. Since X-ray examinations involve ionizing radiation, there is a potential risk of fetal malformation or miscarriage for pregnant women. It is essential to confir...[Read More] Impact of X-rays on Fertility Treatments: What You Need to Know
Understanding the Risks of Multiple X-Ray Exposures in Dental Care
Excessive exposure to X-rays in a short period of time? Hello, Doctor. Since December of last year until now in April, I have undergone multiple dental procedures, including wisdom tooth extraction. Due to my excessive concern about cavities in my wisdom teeth, I have visited sev...
Dr. Wang Yifen Reply:
According to the calculation method provided by the American Society of Radiologic Technologists, the radiation dose from five dental X-rays is approximately 0.025 mSv, while the dose from six full-mouth X-rays is about 0.06 mSv. A single 3D dental computed tomography (CT) scan h...[Read More] Understanding the Risks of Multiple X-Ray Exposures in Dental Care
Understanding the Relationship Between X-Ray Dose and Exposure Time
The relationship between X-ray dosage and exposure time is that the longer the exposure time, the higher the radiation dose received by the patient. This is because the amount of radiation delivered is directly proportional to the duration of exposure. Therefore, to minimize radi...
Dr. Wang Yifen Reply:
Dose unit: Sievert (Sv), which indicates the magnitude of radiation's impact on the human body. 1 Sievert (Sv) = 1000 millisieverts (mSv); 1 millisievert (mSv) = 1000 microsieverts (µSv). The radiation exposure dose is related to factors such as exposure time and distance, a...[Read More] Understanding the Relationship Between X-Ray Dose and Exposure Time
Understanding Radiation Exposure from Pediatric CT Scans
Radiation Concerns in Pediatric Brain CT Scans Hello Dr. Wang, about six years ago, my child underwent a brain CT scan at a medical center when he was just over a month old. I am unsure how much radiation dose was absorbed based on the technology at that time. Could this have any...
Dr. Wang Yifen Reply:
The assessment of radiation dose and risk is primarily based on average values for adults. An adult receives approximately 2 millisieverts of radiation from a single brain CT scan, with more than 99% of individuals not experiencing an increased risk of additional cancer. The calc...[Read More] Understanding Radiation Exposure from Pediatric CT Scans
Understanding Chest X-Ray Challenges: Accuracy and Comparison Insights
Left chest pain X-ray issues? 1. It is indeed recommended to have chest X-rays performed at the same hospital, as using the same machine allows for better comparison of images over time, making it easier to detect any changes. 2. The technical capabilities of X-ray machines can ...
Dr. Wang Yifen Reply:
1. Chest X-ray examinations are not required to be performed on the same machine or at the same hospital. 2. Hospitals that have passed evaluation by the medical review committee will have qualified radiologic technologists perform X-rays for patients, ensuring a competent level ...[Read More] Understanding Chest X-Ray Challenges: Accuracy and Comparison Insights
Is Low-Dose Lung CT Enough to Replace Chest X-Ray in Health Checks?
Is low-dose computed tomography of the lungs redundant compared to chest X-ray examination? Hello, general health check-up packages usually include a chest X-ray. If I opt to pay out-of-pocket for a low-dose lung CT scan, can I skip the chest X-ray to avoid duplication? If both t...
Dr. Wang Yifen Reply:
Chest X-rays and low-dose computed tomography (CT) scans of the lungs are obtained using different imaging diagnostic tools and should not be considered duplicate examinations. For lung cancer screening, it is recommended to use low-dose CT scans as the screening tool. General he...[Read More] Is Low-Dose Lung CT Enough to Replace Chest X-Ray in Health Checks?
Is Frequent Chest X-Ray Safe? Understanding Risks and Concerns
X-ray and CT issues? Hello, Doctor: This year, I have frequently experienced chest pain, which has led me to visit the hospital often. I have undergone approximately 10 chest X-rays within a year, but each time the results have shown nothing significant. A month ago, I also had a...
Dr. Sun Shengyi Reply:
A standard chest X-ray is a low-radiation examination that is widely accepted and effective for diagnosing pulmonary conditions, with a radiation dose of approximately 0.02 millisieverts (mSv). In contrast, the radiation dose from a computed tomography (CT) scan is significantly ...[Read More] Is Frequent Chest X-Ray Safe? Understanding Risks and Concerns
Multiple Chest X-Rays: Weighing Risks and Benefits for Asthma Patients
Repeated X-ray imaging of the same area? The doctor would like to consult you regarding their personal history of asthma since childhood, which has led to multiple chest X-rays each year. In early October of this year, they experienced a prolonged cough and underwent two addition...
Dr. Sun Shengyi Reply:
The radiation dose from a standard chest X-ray is approximately 0.02 millisieverts (mSv), which is a very low dose and is widely accepted as the first-line imaging test for evaluating the lungs. Having several chest X-rays annually due to routine check-ups or medical needs does n...[Read More] Multiple Chest X-Rays: Weighing Risks and Benefits for Asthma Patients
Understanding the Risks of X-rays for Young Children: A Parent's Guide
The risks of X-ray exposure in young children? Hello Doctor: I would like to ask about my child who had an X-ray taken at 6 months old to check the spine (including both chest and abdomen), and another X-ray at 2 years old to check for pneumonia (which also included the abdomen i...
Dr. Wang Yifen Reply:
The risk of radiation-induced cancer is related to radiation dose, age, gender (with females being more sensitive than males), and the organ being irradiated. Generally, the radiation dose from a chest X-ray is quite low; according to the American College of Radiology, the radiat...[Read More] Understanding the Risks of X-rays for Young Children: A Parent's Guide