Calcanium Both AP/LAT at Dr. Essa Lab

Calcanium Both AP/LAT at Dr. Essa Lab

The Calcanium Both AP/LAT at Dr. Essa Lab is a highly specialized, non-invasive diagnostic imaging examination designed to evaluate the calcaneus (heel bone) of both feet. The calcaneus is the largest of the tarsal bones, serving as the foundational support for the human body’s weight and playing a critical role in gait, balance, and shock absorption during locomotion. When patients present with acute trauma, chronic heel pain, or suspected structural abnormalities, a bilateral radiographic assessment is essential. By obtaining both Anteroposterior (AP) — often performed as an axial projection to profile the calcaneus along its longitudinal axis — and Lateral (LAT) views of both heels, radiologists can perform a comprehensive comparative analysis. This bilateral comparison is crucial because subtle skeletal variations, stress fractures, or early inflammatory changes are far easier to detect when comparing the symptomatic foot with the contralateral, asymptomatic foot. Dr. Essa Laboratory & Diagnostic Centre, a premier diagnostic institution in Karachi, Pakistan, utilizes state-of-the-art digital radiography (DR) technology to perform this examination, ensuring high-resolution images with minimal radiation exposure to the patient.

Digital radiography represents a significant technological advancement over traditional film-based X-rays. At Dr. Essa Lab, the digital detectors capture X-ray photons with extreme precision, converting them into digital signals that are instantly processed by advanced imaging software. This technology allows the consultant radiologist to manipulate image contrast, zoom in on specific bony trabeculae, and measure critical anatomical angles with digital precision. The primary anatomical structures evaluated during a Calcanium Both AP/LAT examination include the calcaneal tuberosity, the sustentaculum tali, the anterior process of the calcaneus, the subtalar (talocalcaneal) joint, and the calcaneocuboid joint. Additionally, the examination provides valuable indirect information regarding the surrounding soft tissues, including the insertion site of the Achilles tendon (tendoachilles) at the posterior calcaneal tuberosity and the origin of the plantar fascia at the plantar aspect of the heel. Understanding these anatomical relationships is vital for diagnosing a wide range of orthopedic, podiatric, and rheumatologic conditions.

Clinical Procedure: What to Expect

Patient Preparation

Preparing for a Calcanium Both AP/LAT X-ray at Dr. Essa Lab is simple and straightforward, requiring minimal effort from the patient. Because this is a non-contrast, plain radiographic examination, there are no dietary restrictions, and you do not need to fast. Patients can continue taking their regular medications and eating normally prior to the test. However, to ensure the highest quality images and prevent diagnostic artifacts, please follow these guidelines:

• Wear loose, comfortable clothing that can easily be rolled up to the knee.
• Remove all jewelry, anklets, toe rings, or metallic accessories from both lower extremities, as metal blocks X-rays and can obscure critical bony details on the image.
• You will be asked to remove your shoes, socks, or stockings before the procedure begins.
• If you are pregnant or suspect you might be pregnant, it is absolutely mandatory to inform the technologist or radiologist beforehand so that appropriate lead shielding can be applied to protect the developing fetus, or alternative imaging can be considered.

During the Procedure

Upon entering the digital X-ray suite at Dr. Essa Lab, you will be greeted by a certified radiologic technologist who will guide you through the process. The procedure is entirely painless and typically takes between 10 to 15 minutes to complete for both feet. For the lateral (LAT) view, you will be positioned either lying on your side on the radiographic table or seated with your foot resting flat on its outer (lateral) aspect on the digital image receptor. The technologist will carefully align your heel to capture a true profile view of the calcaneus, showcasing the subtalar joint space and the posterior and plantar borders of the bone. For the anteroposterior (AP) or axial view, you will typically sit on the table with your leg extended. A strap or bandage may be gently placed around the forefoot, which you will hold to pull your toes back (dorsiflexion). This positions the heel flat against the receptor, allowing the X-ray tube to be angled precisely to project the entire length of the calcaneus without overlapping other tarsal bones. During the brief exposure, which lasts only a fraction of a second, you must remain perfectly still to prevent motion blur. The technologist will step behind a protective lead barrier to activate the machine, and they will repeat this process for both the left and right heels to complete the bilateral study.

When is a Calcanium Both AP/LAT Performed?

Acute Calcaneal Fractures

An acute calcaneal fracture is one of the most common indications for a Calcanium Both AP/LAT examination. These fractures typically result from high-energy axial loading forces, such as falling from a height directly onto the heels or being involved in a high-impact motor vehicle accident. Patients present with excruciating heel pain, severe localized swelling, extensive ecchymosis (bruising) extending to the sole of the foot, and an absolute inability to bear weight. Emergency physicians and orthopedic surgeons routinely request bilateral calcaneal X-rays to assess the severity of the fracture, determine if it is intra-articular (extending into the subtalar joint), and compare the injured heel with the uninjured side to reconstruct the patient’s normal anatomy. The lateral view is particularly critical for measuring Boehler’s angle and the Angle of Gissane, which guide surgical planning.

Plantar Fasciitis and Calcaneal Spurs

Plantar fasciitis is a leading cause of chronic heel pain, characterized by sharp, stabbing pain during the first steps in the morning or after periods of rest. While plantar fasciitis is primarily a clinical diagnosis of soft tissue inflammation, a Calcanium Both AP/LAT X-ray is frequently performed to rule out other bony pathologies and to evaluate for the presence of a plantar calcaneal spur (enthesophyte). These bony spurs develop at the origin of the plantar fascia on the anteromedial aspect of the calcaneal tuberosity due to chronic tension and repetitive microtrauma. Identifying the size, location, and bilateral presence of these spurs helps podiatrists and orthopedists customize conservative treatment plans, such as orthotic inserts, physical therapy, or localized injections.

Calcaneal Stress Fractures

Unlike acute fractures, calcaneal stress fractures develop gradually over time due to repetitive, submaximal loading. This condition is highly prevalent among long-distance runners, military recruits, and individuals who suddenly increase their physical activity levels. The primary symptom is an insidious onset of heel pain that worsens with activity and improves with rest, accompanied by localized tenderness when squeezing the heel from both sides (the calcaneal squeeze test). In the early stages, stress fractures may not be visible on standard radiographs. However, a bilateral Calcanium AP/LAT study is crucial for detecting subtle, late-stage signs such as a faint, sclerotic line running perpendicular to the normal bony trabeculae, indicating a healing stress fracture, or localized periosteal reaction.

Systemic Inflammatory Arthropathies

The calcaneus is a frequent target for systemic inflammatory conditions, particularly seronegative spondyloarthropathies such as ankylosing spondylitis, reactive arthritis (Reiter’s syndrome), and psoriatic arthritis, as well as rheumatoid arthritis. These conditions often cause enthesitis, which is inflammation at the sites where tendons or ligaments insert into the bone. Patients experience chronic, bilateral heel pain, stiffness, and swelling around the Achilles tendon insertion. A bilateral Calcanium AP/LAT X-ray assists rheumatologists by detecting characteristic radiographic features, including cortical erosions at the posterior calcaneal tuberosity, retrocalcaneal bursitis (visible as soft tissue density), and fluffy periosteal new bone formation, helping to differentiate inflammatory arthritis from mechanical heel pain.

Haglund’s Deformity and Achilles Tendinopathy

Haglund’s deformity, often referred to as a “pump bump,” is a symptomatic bony enlargement of the posterosuperior aspect of the calcaneus. This prominent bone rubs against rigid shoe counters, leading to painful inflammation of the overlying retrocalcaneal bursa and the Achilles tendon itself. Patients present with a visible, painful bump on the back of the heel, localized redness, and tenderness. A lateral calcaneal X-ray is the definitive diagnostic tool to visualize this bony prominence and evaluate the relationship between the calcaneus and the Achilles tendon. It allows the clinician to measure the Fowler-Philip angle and assess for associated insertional Achilles tendon calcification, guiding both conservative footwear modifications and surgical resection decisions.

What Does a Calcanium Both AP/LAT Detect?

A comprehensive Calcanium Both AP/LAT examination at Dr. Essa Lab is highly sensitive for identifying a wide array of pathological changes within the hindfoot. By utilizing advanced digital imaging, our consultant radiologists can detect the following clinical findings:

• Acute Cortical Disruption: Clear breaks in the outer bony cortex of the calcaneus, indicating an acute fracture.
• Intra-articular Fracture Extension: Displacement of fracture fragments into the subtalar or calcaneocuboid joint spaces.
• Decreased Boehler’s Angle: An angle of less than 20 degrees on the lateral view, indicating calcaneal compression or collapse.
• Increased Angle of Gissane: Distortion of the critical angle of the calcaneus, suggesting severe articular disruption.
• Plantar Calcaneal Spurs: Well-defined bony projections arising from the plantar aspect of the calcaneal tuberosity.
• Posterior Calcaneal Spurs: Bony enthesophytes at the insertion of the Achilles tendon.
• Sclerotic Stress Lines: Linear bands of increased bone density running perpendicular to trabeculae, indicative of a healing stress fracture.
• Posterosuperior Bony Prominence: Structural enlargement characteristic of Haglund’s deformity.
• Subtalar Joint Space Narrowing: Loss of cartilage within the talocalcaneal joint, signifying osteoarthritis.
• Calcaneocuboid Joint Osteoarthritis: Subchondral sclerosis and joint space narrowing at the calcaneocuboid articulation.
• Subchondral Cysts: Small, fluid-filled cavities in the bone directly beneath the joint cartilage, indicating chronic joint wear.
• Osteolytic Lesions: Areas of localized bone destruction, which may suggest infection (osteomyelitis) or, rarely, benign or malignant bone tumors.
• Periosteal Reaction: New bone formation along the outer cortex, indicating healing, infection, or chronic inflammation.
• Bony Sequestrum: A piece of dead bone that has become separated during a chronic osteomyelitis process.
• Involucrum Formation: A sheath of new bone surrounding a sequestrum in cases of active bone infection.
• Localized Osteopenia: Decreased bone mineral density, often seen in disuse atrophy or chronic regional pain syndrome (CRPS).
• Achilles Tendon Calcification: Radiopaque calcium deposits within the distal substance of the Achilles tendon.
• Retrocalcaneal Bursitis: Increased soft tissue density and obliteration of the normal fat pad anterior to the Achilles tendon (Kager’s fat pad).
• Plantar Soft Tissue Swelling: Thickening and increased density of the soft tissues beneath the heel, correlating with acute plantar fasciitis.
• Radiopaque Foreign Bodies: Detection of metallic, glass, or dense organic materials embedded in the heel’s soft tissues.
• Sever’s Disease (Calcaneal Apophysitis): Fragmentation and increased density of the calcaneal apophysis in pediatric patients experiencing growth-related heel pain.
• Subtalar Joint Subluxation: Partial dislocation or misalignment of the talocalcaneal joint.
• Trabecular Disorganization: Disruption of the normal weight-bearing bone patterns, indicating metabolic bone disease or chronic remodeling.
• Cortical Thickening: Hyperostosis of the calcaneal cortex due to chronic mechanical stress or healing.
• Soft Tissue Emphysema: Presence of gas bubbles within the soft tissues of the foot, a critical finding indicating a gas-producing bacterial infection.

Turnaround Time and Report Access at Dr. Essa Lab

At Dr. Essa Laboratory & Diagnostic Centre, we understand that timely diagnostic results are critical for effective clinical decision-making and patient peace of mind. Our digital radiography systems allow for instantaneous image acquisition and processing. Once your Calcanium Both AP/LAT X-ray is completed, the digital images are immediately transferred to our secure Picture Archiving and Communication System (PACS). A highly qualified, board-certified consultant radiologist reviews the images, performs necessary measurements (such as Boehler’s angle), and drafts a comprehensive, medically accurate report. The finalized, signed report is typically available within a few hours of the procedure. Dr. Essa Lab offers convenient, modern report access options; patients can securely view and download their diagnostic reports and digital images online through the official Dr. Essa Lab web portal or dedicated mobile application. Physical copies of the report and high-resolution films can also be collected directly from the branch where the test was performed in Karachi or other regional centers.

Calcanium Both AP/LAT Findings Overview

Structure / Parameter Evaluated	Normal Findings	Possible Abnormal Findings
Calcaneal Cortex	Intact, smooth cortical margins without disruption or step-off.	Cortical break, displacement of fragments, or step-off indicating acute fracture.
Subtalar Joint Space	Preserved joint space with smooth articular surfaces and no subchondral sclerosis.	Joint space narrowing, subchondral sclerosis, osteophyte formation, or intra-articular fracture extension.
Plantar Fascia Insertion	Smooth bone surface at the anteromedial calcaneal tuberosity with normal soft tissue thickness.	Plantar calcaneal spur (enthesophyte) formation, localized soft tissue thickening indicating plantar fasciitis.
Achilles Tendon Insertion	Normal posterior cortical contour with thin, well-defined soft tissue shadow.	Posterior calcaneal spur, Haglund’s deformity (posterosuperior prominence), retrocalcaneal bursitis, or tendon calcification.
Boehler’s Angle	Normal range between 20 and 40 degrees.	Angle less than 20 degrees, indicating calcaneal compression fracture or articular collapse.
Trabecular Pattern	Normal, organized trabecular bone architecture reflecting physiological weight-bearing lines.	Disorganized trabeculae, sclerotic bands (stress fracture), or osteolytic bone destruction (osteomyelitis).
Soft Tissues	Normal fat pad visualization (Kager’s fat pad) and uniform soft tissue thickness.	Obliteration of Kager’s fat pad, localized soft tissue swelling, or presence of radiopaque foreign bodies.

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 Calcanium Both AP/LAT?

• Established Legacy of Trust: Serving patients since 1987 with an unwavering commitment to diagnostic accuracy and clinical excellence.
• Advanced Digital Radiography: Utilizing modern, low-dose digital X-ray technology that ensures superior image resolution while minimizing radiation exposure.
• Expert Radiologists: All imaging studies are interpreted by highly experienced, board-certified consultant radiologists specializing in musculoskeletal imaging.
• Bilateral Comparative Studies: Routine protocol for Calcanium Both AP/LAT ensures precise side-by-side comparison for accurate diagnosis.
• Rapid Turnaround Time: Efficient workflow ensures that finalized reports are available within hours of your examination.
• Convenient Online Access: Seamlessly download your reports and view your digital X-ray images via our secure online patient portal or mobile app.
• Extensive Branch Network: Conveniently located diagnostic centers across Karachi and other major cities, offering easy accessibility.
• ISO-Certified Quality: Adhering to stringent international quality control standards to guarantee reliable and precise diagnostic outcomes.