Heel AP/LAT – (LT) at Dr. Essa Lab

Heel AP/LAT – (LT) at Dr. Essa Lab

The Heel AP/LAT – (LT) is a specialized diagnostic imaging examination designed to evaluate the left heel (calcaneus) using plain radiography. This test involves taking two distinct views of the left heel: the Anteroposterior (AP) view—often performed as an axial projection to visualize the calcaneus in its longitudinal axis—and the Lateral (LAT) view, which provides a side-profile image of the heel bone and surrounding structures. At Dr. Essa Laboratory & Diagnostic Centre, this imaging modality is utilized to investigate a wide range of clinical conditions affecting the posterior aspect of the left foot. By employing low-dose ionizing radiation, this non-invasive procedure delivers high-resolution images that help clinical specialists diagnose fractures, joint degeneration, inflammatory conditions, and structural abnormalities.

The calcaneus is the largest bone in the human foot, serving as the foundational support for weight-bearing activities and acting as a crucial lever for the calf muscles during walking and running. Because it is subjected to immense mechanical stress daily, the left heel is highly susceptible to acute trauma, repetitive strain injuries, and chronic degenerative processes. The Heel AP/LAT – (LT) examination allows radiologists to meticulously inspect the bony architecture of the left calcaneus, the subtalar joint (where the calcaneus meets the talus), the calcaneocuboid joint, and the surrounding soft tissues, including the attachment sites of the plantar fascia and the Achilles tendon. Understanding the structural integrity of these components is vital for formulating an effective orthopedic or podiatric treatment plan.

At Dr. Essa Lab, which has established a legacy of diagnostic excellence across Pakistan, including major hubs like Karachi, this radiological examination is performed using modern digital radiography (DR) technology. Digital X-rays offer significant advantages over traditional film-based imaging, including reduced radiation exposure for the patient, instantaneous image acquisition, and the ability to digitally manipulate image contrast and sharpness for optimal visualization. This advanced technology ensures that even minute microfractures, subtle bone spurs, or early signs of joint space narrowing are captured with exceptional clarity, facilitating an accurate and timely diagnosis by experienced consultant radiologists.

Clinical Procedure: What to Expect

Patient Preparation

One of the primary benefits of a plain X-ray like the Heel AP/LAT – (LT) is that it requires minimal preparation from the patient. However, adhering to the following guidelines ensures a smooth and efficient imaging process:

• Clothing: Patients are advised to wear comfortable, loose-fitting clothing. It is highly recommended to wear footwear and socks that can be easily removed, as the left foot and ankle must be completely bare for the examination.
• Removal of Metallic Objects: Any metallic items, such as ankle bracelets, toe rings, zippers, or metallic clasps on footwear, must be removed from the left lower extremity. Metal causes artifacts on X-ray images, which can obscure critical anatomical details.
• Pregnancy Notification: Female patients who are pregnant, or suspect they might be, must inform the radiographer or medical staff before the procedure. While the radiation dose for a heel X-ray is extremely low and focused far from the abdomen, appropriate safety precautions, such as placing a lead apron over the pelvic region, will be implemented to protect the developing fetus.
• Documentation: Patients should bring their doctor's prescription, previous imaging reports (such as older X-rays, MRIs, or ultrasounds of the left foot), and relevant medical history to assist the reporting radiologist.
• No Fasting Required: There are no dietary restrictions or fasting requirements for this non-contrast skeletal X-ray. Patients can eat, drink, and take their routine medications as usual.

During the Procedure

The Heel AP/LAT – (LT) procedure is rapid, entirely painless, and typically completed within 5 to 10 minutes. The process is conducted by a qualified radiographer who ensures patient comfort and safety throughout the session:

• Positioning for the Lateral (LAT) View: The patient is usually asked to lie on the examination table on their left side (lateral recumbent position) or sit with the left leg extended. The left foot is rotated externally so that the lateral aspect of the heel rests flat against the digital image receptor. The foot is dorsiflexed to a 90-degree angle to properly align the calcaneus and surrounding joints.
• Positioning for the Anteroposterior (AP) / Axial View: For the axial projection of the calcaneus, the patient sits with the left leg fully extended. A strap or bandage may be gently placed around the forefoot, which the patient pulls back slightly to achieve maximum dorsiflexion. The X-ray tube is angled cranially (typically at 40 degrees to the long axis of the foot) to project the calcaneus free of the overlying metatarsals and ankle structures.
• Radiation Safety and Shielding: To minimize unnecessary radiation exposure, a lead apron or shield is placed over the patient's lap and pelvic area. The radiographer collimates the X-ray beam strictly to the region of the left heel, ensuring compliance with the ALARA (As Low As Reasonably Achievable) safety principle.
• Image Acquisition: The patient must remain completely still for a few seconds while each exposure is taken. Any movement during the exposure can cause motion blur, requiring a repeat scan. The radiographer steps behind a protective screen to operate the X-ray machine.
• Post-Procedure: Once the radiographer verifies that the digital images are clear and anatomically complete, the patient is free to put on their socks and shoes and leave the facility immediately. There are no post-procedure restrictions, and patients can resume all normal daily activities right away.

When is a Heel AP/LAT – (LT) Performed?

Plantar Fasciitis and Calcaneal Spurs

Plantar fasciitis is one of the most common causes of chronic heel pain, characterized by inflammation of the thick band of tissue that runs across the bottom of the foot. When a patient presents with persistent, sharp pain on the underside of the left heel—particularly during the first steps in the morning—a physician will often request a Heel AP/LAT – (LT) X-ray. The lateral view is highly effective at identifying calcaneal spurs (osteophytes), which are bony projections that develop at the plantar fascia's attachment site on the inferior aspect of the calcaneus. While the spur itself is often a secondary finding rather than the direct cause of pain, its presence confirms chronic mechanical stress and inflammation in the region, helping to guide targeted physical therapy, orthotic recommendations, or medical interventions.

Calcaneal Fractures and Trauma

The calcaneus is highly vulnerable to fractures resulting from high-energy trauma, such as falls from a height, motor vehicle accidents, or sports-related impacts. A patient presenting with acute, severe pain, swelling, bruising, and an inability to bear weight on the left foot after an injury requires immediate radiographic evaluation. The Heel AP/LAT – (LT) is the primary diagnostic tool used to assess for calcaneal fractures. The lateral view allows the radiologist to measure Bohler's angle and the Gissane angle, which are critical radiographic markers used to determine the severity of joint depression and displacement. The axial (AP) view helps evaluate the width of the calcaneus and checks for lateral bulging or involvement of the subtalar joint, which are vital factors in deciding between conservative management and surgical reconstruction.

Achilles Tendonitis and Retrocalcaneal Bursitis

Pain localized to the posterior aspect of the left heel, where the calf muscles connect to the bone, often points to Achilles tendonitis or retrocalcaneal bursitis. A Heel AP/LAT – (LT) is performed to evaluate the posterior superior aspect of the calcaneus. This imaging helps detect Haglund's deformity, an abnormal bony enlargement of the posterosuperior calcaneus that can chronically irritate the Achilles tendon and the adjacent bursa. Additionally, the lateral X-ray can reveal calcification within the Achilles tendon insertion (insertional Achilles tendinopathy) or soft tissue swelling in the pre-Achilles fat pad (Kager's fat pad), providing clear objective evidence to support a clinical diagnosis of posterior heel pain syndromes.

Unexplained Left Heel Pain

When a patient experiences persistent, localized pain in the left heel that does not respond to standard conservative treatments, and has no clear history of trauma, a diagnostic X-ray is indicated to rule out underlying structural or pathological causes. Chronic heel pain can stem from micro-instability, stress fractures of the calcaneus (common in runners or military recruits), or early-stage bone diseases. By obtaining high-resolution AP and lateral views of the left heel, clinicians can systematically rule out metabolic bone diseases, localized bone loss, or joint space narrowing in the subtalar joint, ensuring that the patient receives an accurate diagnosis rather than undergoing empirical, ineffective treatments.

Systemic Inflammatory Conditions

Systemic inflammatory arthropathies, such as rheumatoid arthritis, ankylosing spondylitis, psoriatic arthritis, and reactive arthritis, frequently manifest in the feet. The heel is a primary site for enthesitis—inflammation of the sites where tendons or ligaments insert into bone. A physician may order a Heel AP/LAT – (LT) to assess for bilateral or unilateral erosive changes, subchondral cysts, or abnormal bone remodeling at the entheses of the left foot. Detecting these radiographic hallmarks early in the disease course allows rheumatologists to adjust systemic therapies, monitor disease progression, and implement supportive foot care strategies to preserve the patient's mobility and quality of life.

What Does a Heel AP/LAT – (LT) Detect?

The Heel AP/LAT – (LT) is a highly sensitive diagnostic tool for identifying a wide array of bony and soft tissue abnormalities in the left heel region. The primary findings that can be detected through this examination include:

• Plantar Calcaneal Spurs: Bony outgrowths on the inferior aspect of the left calcaneus, indicating chronic plantar fascial tension.
• Posterior Calcaneal Spurs: Osteophytes at the insertion of the Achilles tendon on the posterior calcaneal tuberosity.
• Calcaneal Fractures: Disruption in the bony cortex of the left calcaneus, including intra-articular and extra-articular fractures.
• Stress Fractures: Subtle, hairline fracture lines or localized bands of sclerosis indicating healing stress fractures of the calcaneus.
• Haglund's Deformity: An prominent bony prominence at the posterosuperior aspect of the left calcaneus (often called "pump bump").
• Subtalar Joint Osteoarthritis: Narrowing of the joint space between the talus and calcaneus, subchondral sclerosis, and osteophyte formation.
• Calcaneocuboid Joint Degeneration: Degenerative joint changes at the articulation between the calcaneus and the cuboid bone.
• Achilles Tendon Calcification: Calcium deposits within the distal portion of the left Achilles tendon.
• Soft Tissue Swelling: Increased density or thickening of the soft tissues surrounding the left heel, indicating acute inflammation or hematoma.
• Kager's Fat Pad Obliteration: Loss of the normal radiolucency of the pre-Achilles fat pad, suggesting retrocalcaneal bursitis or tendon pathology.
• Osteomyelitis: Radiographic signs of bone infection, such as localized bone destruction (lysis) and periosteal reaction in the left calcaneus.
• Bone Cysts: Benign fluid-filled cavities within the calcaneus, often presenting as well-defined radiolucent lesions.
• Osteopenia or Osteoporosis: Generalized reduction in bone density and thinning of the trabecular pattern of the left heel bone.
• Foreign Bodies: Radiopaque foreign objects embedded in the soft tissues of the left heel.
• Subchondral Cysts: Small, fluid-filled spaces forming just below the joint cartilage in patients with advanced joint disease.
• Erosive Changes: Focal bone loss at the joint margins or entheses, characteristic of inflammatory arthritis like rheumatoid arthritis.
• Periosteal Reaction: Formation of new bone in response to injury, infection, or chronic irritation of the calcaneal cortex.
• Congenital Anomalies: Structural variations such as tarsal coalition (abnormal fusion between the calcaneus and other tarsal bones).
• Bone Tumors: Primary benign or malignant bone neoplasms, or metastatic lesions involving the left calcaneus (rare but detectable).
• Disuse Atrophy: Localized bone thinning resulting from prolonged non-weight bearing or immobilization of the left lower limb.

Turnaround Time and Report Access at Dr. Essa Lab

At Dr. Essa Laboratory & Diagnostic Centre, patient convenience and rapid clinical reporting are top priorities. Once your Heel AP/LAT – (LT) X-ray is completed, the digital images are instantly uploaded to our secure Picture Archiving and Communication System (PACS). A highly qualified consultant radiologist reviews the images, analyzes the bony structures, measures relevant angles, and compiles a comprehensive diagnostic report.

Typically, the finalized radiographic report and high-quality printed films or digital copies are available within a few hours of the procedure. Patients can conveniently access their reports online through the Dr. Essa Lab official website or mobile application by entering their unique patient ID and password. This digital access ensures that you can share your results immediately with your referring physician, avoiding unnecessary delays in starting your treatment plan. Physical copies of the report and X-ray films can also be collected directly from the diagnostic center where the test was performed.

Heel AP/LAT – (LT) Findings Overview

Structure / Parameter Evaluated	Normal Findings	Possible Abnormal Findings
Left Calcaneus Bone Cortex	Intact, smooth, and continuous bony margins without disruption.	Fracture lines, cortical step-off, periosteal reaction, or erosion.
Calcaneal Trabecular Pattern	Normal density with organized trabeculae reflecting typical weight-bearing lines.	Localized radiolucency (osteolysis), bone cysts, or diffuse osteopenia.
Inferior Calcaneal Surface	Smooth contour at the attachment site of the plantar fascia.	Plantar calcaneal spur (osteophyte formation), cortical roughening.
Posterosuperior Calcaneal Border	Normal rounded contour without prominent bony projections.	Haglund's deformity (prominent bony spur), posterior calcaneal spur.
Subtalar Joint Space	Preserved, uniform joint space between the talus and calcaneus.	Joint space narrowing, subchondral sclerosis, subchondral cysts, osteophytes.
Calcaneocuboid Joint	Congruent joint margins with normal joint space width.	Degenerative joint disease, subchondral sclerosis, or joint subluxation.
Kager's Fat Pad (Pre-Achilles)	Clear, radiolucent triangular fat space anterior to the Achilles tendon.	Increased radiodensity, blurring, or obliteration indicating bursitis or tendonitis.
Soft Tissues of the Heel	Normal thickness and density without swelling or foreign bodies.	Diffuse soft tissue thickening, localized edema, or radiopaque foreign objects.

Note: Diagnostic findings should always be interpreted by a qualified healthcare professional together with the patient's symptoms, medical history, physical examination, laboratory investigations, previous imaging studies, and other relevant clinical information. Additional investigations or specialist consultation may be recommended depending on the findings.

Why Choose Dr. Essa Lab for Heel AP/LAT – (LT)?

• Experienced Healthcare Professionals: Our team consists of highly trained radiographers and board-certified consultant radiologists specializing in musculoskeletal imaging.
• Modern Diagnostic Approach: We utilize advanced digital radiography technology that ensures high-resolution images with minimal radiation exposure.
• Quality Diagnostic Services: Dr. Essa Lab is widely recognized for its commitment to accuracy, maintaining strict quality control protocols across all diagnostic modalities.
• Patient-Focused Care: We prioritize patient comfort, safety, and dignity, providing a supportive environment during the entire imaging process.
• Convenient Location: With an extensive network of branches across Karachi and other major cities, accessing our diagnostic services is easy and convenient.
• Professional Reporting: Our detailed radiological reports are compiled promptly, providing clear and actionable insights for your referring physician.
• Easy Online Access: Patients can view, download, and share their diagnostic reports and images online through our secure web portal and mobile app.
• Affordable and Transparent Pricing: We offer high-quality diagnostic imaging services at competitive rates, ensuring accessible healthcare for all segments of society.