---
title: "Couch Top"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:COUCH_TOP"
  data_integrity_hash: "9b5df18bf0837af53fc6c0ef24465094"
  source_authority: "https://cnfx.com"
  strict_mode: true
source_identity:
  provider: "CNFX Industrial Knowledge Graph"
  index_version: "2026.Q1-Universal"
  authority_id: "URN:CNFX:ME:COUCH_TOP"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/couch-top.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/couch-top"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0-250 kg patient load, 0-1500 N lateral force, -10° to +90° tilt angle, 0-200 cm longitudinal travel"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 350
    unit: "MPa"
    consequence: "Plastic deformation exceeding 0.2% strain in carbon fiber composite structure, buckling instability in aluminum honeycomb core under 1800 N compressive load"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Cyclic loading at 2 Hz frequency exceeding 1500 N amplitude"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Stiffness optimization using 3D finite element analysis to maintain natural frequency &gt; 5 Hz, implementing load cells with 10 N resolution for real-time monitoring"
  - node_2:
      trigger: "Thermal expansion mismatch between carbon fiber top (CTE 0.5×10⁻⁶/K) and aluminum frame (CTE 23×10⁻⁶/K) at ΔT &gt; 40°C"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Graded CTE transition layer using titanium alloy (CTE 8.6×10⁻⁶/K), active thermal control maintaining ΔT &lt; 15°C via Peltier elements"
bom_nodes:
  top-panel:
    type: "component"
    urn: "URN:CNFX:ME:TOP_PANEL"
    interface_type: "physical-logic-coupled"
  side-rails-indexing-channels:
    type: "component"
    urn: "URN:CNFX:ME:SIDE_RAILS_INDEXING_CHANNELS"
    interface_type: "physical-logic-coupled"
  mounting-interface:
    type: "component"
    urn: "URN:CNFX:ME:MOUNTING_INTERFACE"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 7173:2022 FURNITURE - SEATING - TEST METHODS FOR THE DETERMINATION OF STRENGTH AND DURABILITY"
    scope: "Verified Engineering Specification"
  - standard: "ANSI/BIFMA X5.1:2017 GENERAL PURPOSE OFFICE CHAIRS - TESTS"
    scope: "Verified Engineering Specification"
  - standard: "DIN EN 1728:2014 FURNITURE - SEATING - TEST METHODS FOR THE DETERMINATION OF STRENGTH AND DURABILITY"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/couch-top.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "9da3d7733ac990dd72b74227b5ccb6a26ee16bb9eb5b407bc97a48d2342dc340"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Couch Top

## 1. Technical Definition
The primary horizontal surface of a patient positioning couch upon which the patient lies during medical imaging or radiation therapy procedures.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0-250 kg patient load, 0-1500 N lateral force, -10° to +90° tilt angle, 0-200 cm longitudinal travel**. Failure boundary: **Material yield at 350 MPa stress, 5 mm permanent deformation under 300 kg static load, 0.5° angular deviation from horizontal plane**, Mechanism: **Plastic deformation exceeding 0.2% strain in carbon fiber composite structure, buckling instability in aluminum honeycomb core under 1800 N compressive load**.

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Cyclic loading at 2 Hz frequency exceeding 1500 N amplitude | 8 | Fatigue crack propagation in load-bearing carbon fiber laminate at 10⁶ cycles | Stiffness optimization using 3D finite element analysis to maintain natural frequency &gt; 5 Hz, implementing load cells with 10 N resolution for real-time monitoring |
| Thermal expansion mismatch between carbon fiber top (CTE 0.5×10⁻⁶/K) and aluminum frame (CTE 23×10⁻⁶/K) at ΔT &gt; 40°C | 8 | Delamination at adhesive interface with shear stress exceeding 25 MPa | Graded CTE transition layer using titanium alloy (CTE 8.6×10⁻⁶/K), active thermal control maintaining ΔT &lt; 15°C via Peltier elements |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| spec | Config-dependent | mm | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Medical Imaging System**, **Radiation Therapy System**, **Patient Positioning Controller**  
**Downstream Applications**: CT Scan Images, MRI Scan Images, Radiation Therapy Treatments  

## 5. Engineering Risks & FAQ
- **Caution**: 
- **Caution**: 
- **Caution**: 

### Q: What are the benefits of carbon fiber composite in medical couch tops?
**A**: Carbon fiber composite provides exceptional strength-to-weight ratio, radiolucency for clear imaging, and durability for repeated clinical use while minimizing patient discomfort.

### Q: How does the couch top interface with positioning systems?
**A**: The couch top features precision mounting interfaces and side rails with indexing channels that securely connect to couch bases and allow accurate, reproducible patient positioning.

### Q: What maintenance is required for medical imaging couch tops?
**A**: Regular cleaning with hospital-grade disinfectants and periodic inspection of mounting hardware and surface integrity ensure optimal performance and patient safety.

## 6. Manufacturing Compliance
- ISO 7173:2022 FURNITURE - SEATING - TEST METHODS FOR THE DETERMINATION OF STRENGTH AND DURABILITY
- ANSI/BIFMA X5.1:2017 GENERAL PURPOSE OFFICE CHAIRS - TESTS
- DIN EN 1728:2014 FURNITURE - SEATING - TEST METHODS FOR THE DETERMINATION OF STRENGTH AND DURABILITY

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Couch Top](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/couch-top)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **3** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: COUCH_TOP | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: b0c3cba5
