Biology ยท Physics

Diagnostic Imaging

984 Questions

Diagnostic imaging involves various techniques used to look inside the human body for diagnosis and treatment. This covers technologies like computed tomography, ultrasound, and magnetic resonance imaging. These questions often appear in general science and general awareness examinations.

Medical imaging technologiesRadiation therapyDiagnostic proceduresNon-destructive testing

Diagnostic Imaging Questions

Multiple choice

Which laser type is commonly used for laser lithotripsy?

  1. Holmium laser

  2. Thulium laser

  3. Nd:YAG laser

  4. Argon laser
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Holmium lasers are frequently used for laser lithotripsy due to their ability to effectively fragment urinary stones with minimal damage to surrounding tissue.

Multiple choice

What is the role of a trocar in laparoscopic surgery?

  1. To create an incision

  2. To insert the laparoscope

  3. To introduce insufflation gas

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A trocar is a surgical instrument used to create an incision, insert the laparoscope, and introduce insufflation gas into the abdominal cavity during laparoscopic surgery.

Multiple choice

Which surgical technique involves making multiple incisions for laparoscopic surgery?

  1. Single-port laparoscopy

  2. Multi-port laparoscopy

  3. Robotic laparoscopy

  4. Hybrid laparoscopy
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Multi-port laparoscopy is a minimally invasive surgical technique that involves making multiple incisions through which surgical instruments and the laparoscope are inserted.

Multiple choice

What is the primary imaging modality used in SPECT scans?

  1. X-rays

  2. Radiofrequency waves

  3. Gamma rays

  4. Ultrasound waves
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

SPECT scans utilize gamma rays emitted by radioisotopes to create images of various organs and tissues.

Multiple choice

What is the main purpose of a SPECT scan?

  1. Evaluating blood flow

  2. Detecting tumors

  3. Assessing organ function

  4. Monitoring treatment response
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

SPECT scans are primarily used to assess the function of various organs, such as the heart, brain, lungs, and kidneys.

Multiple choice

What are some common clinical applications of SPECT scans?

  1. Evaluating myocardial perfusion

  2. Detecting bone metastases

  3. Assessing lung ventilation

  4. Monitoring response to chemotherapy
Reveal answer Fill a bubble to check yourself
Correct answer
Explanation

SPECT scans have various clinical applications, including evaluating myocardial perfusion, detecting bone metastases, assessing lung ventilation, and monitoring response to chemotherapy.

Multiple choice

What is the role of the collimator in a SPECT scanner?

  1. Focusing gamma rays

  2. Shielding the patient from radiation

  3. Rotating the gamma camera

  4. Processing the image data
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The collimator in a SPECT scanner focuses gamma rays emitted from the patient, allowing for better image quality and reduced scatter.

Multiple choice

What is the mathematical algorithm used to reconstruct images from SPECT data?

  1. Filtered backprojection

  2. Maximum likelihood estimation

  3. Ordered subsets expectation maximization

  4. Iterative reconstruction
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Filtered backprojection is the most commonly used algorithm for reconstructing images from SPECT data.

Multiple choice

What is the typical sensitivity of SPECT scans?

  1. 50-60%

  2. 60-70%

  3. 70-80%

  4. 80-90%
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

SPECT scans typically have a sensitivity of around 70-80%.

Multiple choice

What is the typical specificity of SPECT scans?

  1. 80-90%

  2. 90-95%

  3. 95-98%

  4. 98-99%
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

SPECT scans typically have a specificity of around 90-95%.

Multiple choice

Which imaging modality is commonly used for breast cancer screening?

  1. Mammography

  2. Ultrasound

  3. Breast MRI

  4. CT scan
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Mammography is the primary imaging modality used for breast cancer screening in women over the age of 40.

Multiple choice

What is the purpose of a breast ultrasound?

  1. To screen for breast cancer

  2. To evaluate breast lumps or masses

  3. To guide breast biopsy

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Breast ultrasound is used for a variety of purposes, including screening for breast cancer, evaluating breast lumps or masses, and guiding breast biopsy.

Multiple choice

Which imaging modality is used to evaluate the extent of breast cancer?

  1. Mammography

  2. Ultrasound

  3. Breast MRI

  4. CT scan
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Breast MRI is commonly used to evaluate the extent of breast cancer, as it can provide detailed images of the breast tissue and identify any suspicious lesions.

Multiple choice

Which imaging modality is used to guide breast biopsy?

  1. Mammography

  2. Ultrasound

  3. Breast MRI

  4. CT scan
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Ultrasound is commonly used to guide breast biopsy, as it provides real-time images of the breast tissue and allows the physician to accurately target the suspicious lesion.

Multiple choice

What is the purpose of a breast MRI with contrast enhancement?

  1. To screen for breast cancer

  2. To evaluate breast lumps or masses

  3. To detect recurrent breast cancer

  4. To monitor response to breast cancer treatment
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Breast MRI with contrast enhancement is often used to detect recurrent breast cancer, as it can identify small lesions that may not be visible on mammogram or ultrasound.