Contrast and Radiological Procedures Practice Questions

Q: Identify the radiological procedure shown in the image?

Barium meal follow through. ***Barium meal follow through*** - The image shows opacification of the stomach and the entire small bowel loops via oral uptake of a contrast agent, which is characteristic of a **barium meal follow-through**. - This procedure tracks the passage of **barium** from the esophagus, stomach, and duodenum, through the jejunum and ileum, to assess the **small intestine's morphology and function**. *Barium enema* - A **barium enema** involves introducing contrast material rectally to visualize the **colon and rectum**, which is not depicted in this image. - The primary structures opacified in a barium enema are the **large intestine**, not the stomach and small bowel as seen here. *Enteroclysis* - **Enteroclysis** is a specialized study of the small bowel where contrast is directly instilled into the **duodenum** or **proximal jejunum** via a nasoenteric tube. - While it visualizes the small bowel, the image shows oral contrast progression from the stomach, not direct jejunal intubation. *Proctography* - **Proctography**, also known as defecography, is a dynamic study focused specifically on the **rectum and anal canal** during defecation. - This procedure is highly specific to the distal gastrointestinal tract for assessing anorectal function and does not visualize the stomach or extensive small bowel loops.

Q: The Barium Swallow examination shows a mass in the esophagus. What can be the most probable diagnosis?

Esophageal Cancer. ***Esophageal Cancer*** - A **mass** identified in the esophagus on **Barium Swallow** is highly suggestive of esophageal cancer, typically presenting as a **solitary lesion**. - Other associated features may include **dysphagia**, weight loss, and potentially lymphadenopathy on imaging. *Esophageal Ring (Stricture)* - Usually presents as a **narrowing of the esophagus** rather than a distinct mass on imaging, often causing intermittent **dysphagia**. - The appearance is more likely to cause **functional obstruction** rather than present as a **solid mass** in the esophagus. *Esophageal Perforation* - This condition would not present as a **mass**; instead, symptoms include **severe chest pain**, and may show mediastinal air on imaging. - Perforation leads to **acute symptoms** and signs of **infection**, differentiating it from a neoplastic process. *Achalasia* - Characterized by **dilated esophagus** with a **bird-beak appearance** on imaging rather than a discrete mass. - It commonly results in **dysphagia** for solids and liquids, not presenting as a mass lesion on Barium Swallow.

Q: Which of the following imaging techniques is NOT typically used for diagnosing uterine anomalies?

CT (Computed Tomography). ***CT (Computed Tomography)*** - **CT scans** are generally not the preferred imaging modality for diagnosing uterine anomalies due to their **poor soft-tissue contrast** compared to MRI and ultrasound, and the associated **radiation exposure**. - While CT can visualize gross anatomical structures, it is less effective in differentiating the subtle architectural details of the uterus and its internal cavities that are crucial for anomaly detection. *MRI (Magnetic Resonance Imaging)* - **MRI** is considered the **gold standard** for diagnosing complex uterine anomalies due to its excellent **soft-tissue resolution** and multiplanar imaging capabilities. - It provides detailed anatomical information about the uterine muscular layers, uterine cavity, and cervix without the use of ionizing radiation. *Ultrasound (USG)* - **Transvaginal ultrasound (TVS)**, often supplemented with 3D ultrasound, is frequently the **first-line imaging technique** for evaluating uterine anomalies due to its non-invasiveness, accessibility, and ability to provide real-time images. - It can effectively visualize the uterine shape, septum, and fundal contour, and differentiate between various types of anomalies. *Hysterosalpingography (HSG)* - **HSG** is primarily used to evaluate the **patency of the fallopian tubes** and the **internal contour of the uterine cavity**. - While it can identify certain uterine anomalies like septate or bicornuate uteri by outlining the endometrial cavity, it provides limited information about the myometrial wall or external uterine contour.

Q: What is the structure seen in the X-ray?

Stent. ***Stent*** - The image clearly shows **bilateral coiled structures** (pigtails) at the proximal and distal ends within the renal pelvis and bladder, which are characteristic features of **double J stents (ureteral stents)**. - These devices are used to maintain patency in the **ureters**, often to bypass obstructions or facilitate urine drainage. *Surgical clips* - **Surgical clips** are typically small, dense, metallic objects used to ligate vessels or tissue, appearing as tiny, bright specks on X-rays. - The structures seen in the image are long, tubular, and coiled, which is inconsistent with the appearance of surgical clips. *Foley catheter* - A **Foley catheter** is a flexible tube inserted into the bladder to drain urine, sometimes with a balloon tip. - It would typically be seen entirely within the **bladder**, and its path would not extend bilaterally into the renal pelvis as shown. *Intravesical wire* - An **intravesical wire** (a wire entirely within the bladder) would appear as a coiled or linear structure confined to the bladder itself. - The structures in the image extend from the renal region down into the bladder, traversing the **ureters**, which is not typical for an intravesical wire.

Q: What does the following radiograph from a double contrast esophagram represent?

Feline esophagus. **Feline esophagus (Correct)** - The image displays a characteristic transverse striation pattern along the esophageal mucosa, resembling the rings seen in the esophagus of a cat (hence "feline esophagus") - This finding is often associated with gastroesophageal reflux disease (GERD) or eosinophilic esophagitis, representing mucosal edema and inflammation - Also known as "ringed esophagus" or "corrugated esophagus" *Esophageal atresia (Incorrect)* - This is a congenital condition where the esophagus ends in a blind pouch, making it impossible for food to reach the stomach - The radiograph clearly shows a patent esophagus with contrast flowing through it, which rules out atresia *Esophageal stenosis (Incorrect)* - Esophageal stenosis refers to a narrowing of the esophagus, which would appear as a constricted segment on a barium swallow - While there is some irregularity, the primary pattern seen is transverse rings, not a focal, sustained narrowing typical of stenosis *Tracheoesophageal fistula (Incorrect)* - A tracheoesophageal fistula is an abnormal connection between the esophagus and the trachea - This would typically present with aspiration of contrast into the trachea or lungs, which is not evident in the provided image

Q: Which of the following is not considered a contraindication for undergoing an MRI?

Ryle's tube. ***Ryle's tube*** - A **Ryle's tube** is a form of nasogastric tube made of radiopaque plastic, which is entirely **MRI-safe** and does not interact with magnetic fields. - It is made from inert materials that are **non-ferromagnetic**, posing no risk during an MRI scan. *Cardiac pacemaker* - **Cardiac pacemakers** contain metallic components that can malfunction, demagnetize, or migrate due to the strong magnetic fields and radiofrequency pulses of an MRI. - This can lead to **arrhythmias**, **pacemaker failure**, or **heating of leads**, posing a significant risk to the patient. *Cochlear implant* - **Cochlear implants** contain strong magnets and electronic components that can be damaged or displaced by the MRI's magnetic field. - This can cause **pain**, **implant damage**, or **hearing loss** for the patient. *Metallic splinter in eye* - A **metallic splinter in the eye** is a severe contraindication because the strong magnetic field can cause the metal fragment to move. - This movement can lead to **tissue damage**, **hemorrhage**, or **blindness** if it dislodges in the delicate structures of the eye.

Q: What is the investigation of choice for whole body imaging in metastatic breast cancer?

CT Scan. ***CT Scan (Correct answer for NEET 2013)*** - **Contrast-enhanced CT scan** was the standard imaging modality for **whole-body staging** in metastatic breast cancer at the time of this exam (2013). - CT offers **excellent spatial resolution** for detecting metastases in **bone, lung, liver, and lymph nodes**. - It is widely available, relatively quick, and provides comprehensive anatomical information. - **Modern Update:** While CT was the standard in 2013, **PET-CT (FDG-PET/CT) is now considered the gold standard** for whole-body staging in metastatic breast cancer due to its combined metabolic and anatomical imaging capabilities. However, PET-CT was not among the options in this historical question. *Magnetic Resonance Imaging* - **MRI** is highly sensitive for specific sites, particularly for **brain metastases** and **bone metastases (especially spine and bone marrow)**. - **Whole-body MRI** protocols are emerging but require longer acquisition times and specialized equipment. - Not ideal as a single first-line modality for comprehensive whole-body staging compared to CT (or modern PET-CT). *Angiography* - **Angiography** is an invasive vascular imaging procedure used to visualize **arterial blood flow**. - It has **no role in routine metastatic screening or staging** of breast cancer. - Reserved for specific indications like preoperative vascular mapping or interventional procedures. *Venography* - **Venography** specifically visualizes **venous structures** and is used to detect venous thrombosis or venous obstructions. - It is **not applicable** for detecting solid organ metastases, bone lesions, or lymph node involvement in cancer staging.

Q: Barium swallow is used for -

Esophagus. ***Esophagus*** - A **barium swallow** specifically visualizes the **esophagus**, pharynx, and sometimes the early stomach. - It's used to identify abnormalities like **dysphagia**, strictures, **achalasia**, or tumors by coating the mucosal lining. *Colon* - The colon is typically examined using a **barium enema**, where barium sulfate is administered rectally. - This procedure is effective for visualizing the large intestine for conditions like **polyps**, diverticula, or inflammatory bowel disease. *Duodenum* - While a barium swallow may transiently show the **duodenum**, its primary target is the esophagus and stomach. - More detailed imaging of the duodenum often requires an **upper GI series (UGI)**, which is a broader study of the upper digestive tract. *Jejunum* - The jejunum is part of the small intestine and is best visualized through a **small bowel follow-through (SBFT)** procedure. - This involves ingesting barium and taking serial X-rays as it progresses through the small bowel, to detect conditions like **Crohn's disease** or obstructions.

Q: The procedure of choice for the evaluation of aortic aneurysms is -

Computed tomography. ***Computed tomography*** - **Computed tomography (CT)** offers excellent spatial resolution and is the gold standard for diagnosing, staging, and pre-operative planning for aortic aneurysms. - It precisely measures aneurysm size, detects mural thrombus, assesses rupture risk, and evaluates the extent of involvement with surrounding structures. *Ultrasonography* - While useful for initial screening and serial monitoring of known abdominal aortic aneurysms due to its non-invasiveness and cost-effectiveness, its accuracy can be limited by **patient body habitus** and **bowel gas**. - It may not reliably visualize the entire aorta or accurately assess complex anatomy and rupture. *Magnetic resonance imaging* - **Magnetic resonance imaging (MRI)** provides detailed anatomical information and avoids radiation exposure, but it is typically more expensive and time-consuming than CT. - It is often reserved for patients with **renal insufficiency** where iodinated contrast is a concern or when evaluating specific tissue characteristics not well seen on CT. *Arteriography* - **Arteriography** (angiography) is an invasive procedure involving direct contrast injection, carrying risks such as arterial injury and nephrotoxicity. - While it can visualize the aortic lumen, it primarily shows the patent lumen and may **underestimate the true aneurysm size** due to mural thrombus. It is typically used for intervention planning or specific contexts rather than initial diagnosis.

Question 1

Identify the radiological procedure shown in the image?

Accepted Answer

Barium meal follow through

Answer

Barium enema

Answer

Enteroclysis

Answer

Proctography

Question 2

The Barium Swallow examination shows a mass in the esophagus. What can be the most probable diagnosis?

Accepted Answer

Esophageal Cancer

Answer

Esophageal Ring (Stricture)

Answer

Esophageal Perforation

Answer

Achalasia

Question 3

Which of the following imaging techniques is NOT typically used for diagnosing uterine anomalies?

Accepted Answer

CT (Computed Tomography)

Answer

MRI (Magnetic Resonance Imaging)

Answer

Ultrasound (USG)

Answer

Hysterosalpingography (HSG)

Question 4

What is the structure seen in the X-ray?

Accepted Answer

Stent

Answer

Surgical clips

Answer

Foley catheter

Answer

Intravesical wire

Question 5

What does the following radiograph from a double contrast esophagram represent?

Accepted Answer

Feline esophagus

Answer

Esophageal atresia

Answer

Esophageal stenosis

Answer

Tracheoesophageal fistula

Question 6

Which of the following is not considered a contraindication for undergoing an MRI?

Accepted Answer

Ryle's tube

Answer

Cardiac pacemaker

Answer

Cochlear implant

Answer

Metallic splinter in eye

Question 7

What is an X-ray artifact?

Accepted Answer

An unwanted image distortion that doesn't represent actual anatomy

Answer

A radiographic finding that indicates disease pathology

Answer

A normal anatomical structure visible on X-ray

Answer

An image distortion produced when the patient moves during the X-ray procedure

Question 8

What is the investigation of choice for whole body imaging in metastatic breast cancer?

Accepted Answer

CT Scan

Answer

Angiography

Answer

Venography

Answer

Magnetic Resonance Imaging

Question 9

Barium swallow is used for -

Accepted Answer

Esophagus

Answer

Colon

Answer

Duodenum

Answer

Jejunum

Question 10

The procedure of choice for the evaluation of aortic aneurysms is -

Accepted Answer

Computed tomography

Answer

Magnetic resonance imaging

Answer

Arteriography

Answer

Ultrasonography

Contrast and Radiological Procedures — MCQs

Contrast and Radiological Procedures — MCQs

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